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What Happens After An Appeal Brief? (More Art Unit Appeal Stats)

In my previous two posts I looked at timing of ex parte appeals and art unit affirmance/reversal rates. Here I am going to continue with the theme of ex parte appeals. Specifically, how many appeal briefs are filed and what happens after they are filed?

 0.53 answers for every appeal brief; 0.44 PTAB decisions for every answer

Appeal BriefsAnswersAnswers per BriefDecisionsDecisions per Answer
43,13224,2880.5310,6070.44

As shown in the table above, there is a roughly 52% chance that an appeal brief will result in an examiner answer. I was too lazy to generate a breakdown of what happened instead the other 47%, but I promise to do that in a future post.

When the examiner does answer, there is approximately a 44% chance that it will go all the way to a PTAB decision. Again, what happens in the other 56% will be looked at in a future post (go ahead and subscribe so you don’t miss it).

The average art unit had 110 appeal briefs, 62 examiner answers, and 27 decisions in the past 3 years

The first table below shows the overall stats. The second table gives a breakdown by art unit.

Appeal Briefs
(Avg)
Appeal Briefs
(Std Dev)
Answers
(Avg)
Answers
(Std Dev)
Decisions
(Avg)
Decisions
(Std Dev)
110.071.262.047.127.117.6
ArtUnitBriefsAnswers_BriefsDecisions_Answers
37374900.5551020.400735
37444610.5531450.454901
36864470.5816550.330769
37424390.6241450.456204
37314150.4963850.364077
36263920.6989790.332116
37623750.5573330.397129
37453610.6343490.458515
36233530.7875350.39928
36913170.7602520.377593
36833000.7566660.295154
37632980.4093950.467213
36242810.7615650.294392
36932690.7992560.32093
37472690.4423790.411764
37112680.5597010.4
37152680.4962680.323308
36812670.711610.226315
16312590.7104240.429347
36852530.6482210.243902
17932520.6150790.4
36272520.4960310.376
36972460.7723570.247368
36962450.7714280.354497
36922420.6239660.225165
37652420.5578510.451851
37242350.3787230.325842
37352350.5404250.299212
36892300.7434780.339181
37212290.5327510.385245
36872250.4133330.397849
17912230.6367710.450704
36952230.6905820.305194
36252190.625570.386861
36212170.728110.303797
16192160.6527770.255319
36822160.620370.283582
37412150.6186040.481203
26492080.4471150.526881
36882060.7184460.283783
36281980.7777770.344155
36291970.7563450.308724
37431960.4744890.516129
37361920.5208330.33
28721900.40.342105
28751860.3763440.471428
24861830.573770.47619
28371830.366120.373134
36221800.6333330.263157
17921790.6312840.38938
37161780.5168530.358695
16111740.6379310.369369
16121660.6144570.333333
16281640.6036580.363636
17471640.5792680.431578
16161600.63750.40196
37391600.581250.301075
17121570.554140.402298
36491560.6025640.542553
17881550.6774190.390476
17331540.5129870.582278
28591540.3506490.37037
37531540.6233760.385416
16131510.6490060.357142
16181510.6622510.37
36751510.3046350.47826
37541510.5430460.439024
17871500.7733330.525862
17831490.718120.383177
37141490.4899320.287671
16171480.6216210.358695
36941460.7465750.376146
21741450.6344820.565217
26461430.489510.5
36621430.419580.5
26451420.5563380.518987
37231420.5140840.452054
37461420.4929570.285714
37611390.4388480.426229
28561380.3550720.408163
36841380.6376810.329545
24571370.4525540.580645
37781350.3333330.333333
36431340.4925370.439393
17171330.5488720.452054
16511320.6818180.5
21591300.5769230.52
28361300.3538460.434782
37721300.469230.426229
17671280.5468750.485714
24491270.5275590.537313
17711260.4603170.327586
26581260.6269840.49367
37741260.452380.333333
16271250.6480.407407
17321250.520.36923
17891240.6532250.469135
21971220.3934420.520833
37821220.6803270.493975
24681210.4876030.542372
24831200.7750.430107
37881200.5750.463768
24911180.6271180.472972
28421180.5338980.396825
21581170.6410250.466666
24541170.5726490.567164
28841170.3675210.534883
37521170.5470080.453125
17611160.6034480.4
36381160.5948270.463768
17341150.6173910.380281
26891150.6173910.56338
28651150.5826080.358208
37481130.398230.555555
21281120.6517850.589041
21651120.5267850.627118
24871120.6517850.520547
28641120.6517850.438356
36451120.5089280.508771
36541120.4464280.56
37261120.3928570.522727
16341110.5675670.31746
24251110.5765760.546875
26251110.720720.5625
17771100.5636360.467741
17821100.6545450.486111
21531100.5363630.610169
17411090.6788990.337837
24621090.5045870.545454
36461090.6146780.432835
36691090.5412840.525423
37321080.6481480.342857
16531060.6509430.347826
17461050.5333330.535714
17811050.552380.465517
26131050.7619040.6625
37711050.6476190.441176
17211040.5769230.5
21761040.6730760.471428
36741040.4615380.354166
37811040.519230.37037
17661030.5728150.440677
36631030.4466010.456521
36651030.5145630.35849
17351020.4705880.5
17641020.5490190.553571
17971020.4803920.510204
21571020.5980390.57377
28541010.5940590.616666
36511010.4158410.45238
26831000.650.630769
28381000.350.4
1716990.5656560.303571
1726990.4444440.25
2145990.5757570.473684
3671990.3939390.51282
2482980.7142850.571428
3657980.602040.508474
3679980.4183670.414634
2465970.4948450.5
1718960.7395830.464788
2141960.6145830.542372
1765940.5638290.660377
1786940.6595740.48387
2461940.6595740.629032
1711930.440860.634146
1742930.3655910.529411
2194930.483870.6
2426930.5806450.648148
2447930.3978490.54054
1729920.4673910.44186
3717920.3260860.433333
2485910.5384610.653061
1621900.4555550.170731
1714900.5333330.479166
1723900.6222220.339285
2142900.6222220.660714
2456900.50.488888
2862900.6222220.339285
3668900.5888880.490566
1633890.6516850.310344
2156890.5056170.6
2172890.6179770.490909
2443890.5955050.377358
3738890.6741570.216666
3775890.5393250.4375
2173880.7386360.56923
2182880.7272720.625
2632880.5568180.530612
2657880.6818180.483333
1644870.7241370.428571
2154870.6321830.636363
2169870.6436780.660714
2439870.5402290.468085
1763860.5232550.622222
2445860.4767440.609756
2448860.441860.526315
2835860.5465110.489361
1727850.4823520.439024
1774850.4117640.342857
2163850.60.588235
2477840.6666660.607142
2621840.6428570.592592
2685840.4642850.615384
1615830.6144570.392156
1798830.5662650.404255
1799830.5421680.422222
2155830.4578310.447368
2642830.4457830.648648
2831830.5180720.581395
2844830.3493970.448275
3633830.5180720.465116
2123820.6341460.538461
2166820.573170.617021
2845820.2804870.391304
2857820.597560.306122
3728820.6829260.5
1724810.5308640.488372
1785810.7160490.465517
2178810.456790.621621
2883810.3580240.241379
1745800.56250.422222
1794800.56250.422222
3634800.50.525
1731790.569620.355555
2466790.6582270.423076
2617790.5822780.586956
2666790.3037970.583333
2834790.4177210.30303
1722780.50.435897
1768780.7051280.545454
2616780.6666660.653846
2833780.4102560.46875
1629770.4415580.235294
1725770.3246750.4
2434770.6623370.529411
2628770.7402590.578947
2659770.5064930.461538
2191760.6578940.56
2421760.7105260.74074
2458760.4736840.5
2479760.6578940.46
2631760.750.491228
2894760.5263150.35
3749760.2236840.705882
2422750.60.355555
2473750.5466660.512195
2489750.5866660.386363
2847750.4666660.542857
2855750.560.380952
3647750.3466660.538461
3678750.5066660.394736
2144740.6621620.448979
2161740.50.594594
2199740.4324320.5
2696740.7432430.454545
2127730.3835610.571428
2177730.6027390.545454
2196730.4657530.382352
2851730.4246570.32258
2858730.5068490.513513
2112720.4027770.482758
2131720.5555550.475
2168720.50.638888
2184720.5972220.674418
2484720.750.666666
2647720.5138880.432432
2686720.5416660.51282
1778710.408450.482758
1784710.7183090.392156
1795710.6056330.255813
1773700.4285710.266666
1779700.3285710.391304
2132700.6571420.608695
2651700.5714280.425
2694700.4714280.575757
2853700.4285710.433333
2143690.478260.424242
2656690.3478260.375
1772680.250.294117
2124680.4705880.375
2441680.5147050.628571
3612680.2941170.25
3656680.5441170.432432
3673680.5294110.527777
2175670.7164170.458333
2423670.6417910.674418
2492670.5970140.5
2881670.5970140.4
3617670.5373130.472222
3631670.3432830.47826
3661670.3880590.538461
1655660.303030.5
1715660.5303030.485714
2179660.4545450.5
2612660.803030.509433
2876660.409090.259259
2433650.6923070.533333
2467650.5538460.416666
2684650.6615380.418604
1649640.50.09375
1673640.593750.315789
1744640.3750.25
2135640.6250.575
2431640.5156250.454545
2463640.7343750.489361
3664640.4218750.555555
1762630.4603170.344827
1776630.4444440.464285
2136630.5714280.583333
2164630.6666660.619047
2436630.3809520.541666
2498630.4920630.741935
2611630.7777770.55102
2868630.4285710.37037
3779630.5396820.382352
2162620.3870960.541666
3635620.5161290.4375
3655620.5161290.375
3677620.4677410.517241
2126610.622950.710526
2619610.622950.657894
2829610.622950.473684
2887610.5081960.387096
3652610.622950.342105
2424600.7333330.477272
2444600.2333330.642857
2636600.70.523809
1675590.6949150.219512
2171590.5423720.5625
2627590.6440670.473684
3636590.4745760.535714
2442580.5344820.354838
2495580.5172410.666666
1648570.3859640.40909
2437570.5789470.696969
2481570.6666660.394736
2488570.7368420.428571
2626570.4912280.607142
2697570.5087710.655172
2886570.5964910.441176
1652560.5714280.46875
1713560.6428570.472222
2414560.5892850.757575
2438560.6785710.657894
2474560.5535710.645161
2497560.3214280.944444
2618560.6785710.5
2641560.50.5
2811560.5535710.32258
2848560.3750.523809
3637560.5714280.46875
3641560.4107140.434782
2129550.4909090.37037
2152550.4545450.64
2167550.6909090.657894
2472550.4545450.4
2652550.3454540.526315
2677550.6363630.542857
1637540.6111110.393939
1736540.50.555555
2446540.4444440.541666
2459540.50.666666
2464540.1851850.3
2863540.5555550.4
2882540.370370.4
1625530.3207540.294117
2411530.2452830.615384
2455530.264150.5
2643530.5849050.451612
2692530.5849050.612903
3672530.264150.285714
2122520.4230760.40909
2493520.519230.518518
2665520.7307690.710526
2814520.4807690.32
3667520.4230760.454545
1632510.5098030.384615
2125510.627450.46875
2139510.725490.324324
2192510.0784310.25
2193510.4117640.761904
2451510.3529410.777777
2644510.450980.521739
3618510.4313720.5
3725510.3725490.315789
1642500.640.34375
2114500.50.68
2181500.580.37931
2648500.460.695652
2674500.620.451612
2687500.580.482758

Two things jump out at me:

  • TCs 3600 and 3700 are absolutely flooded with appeal briefs. (This is even clearer in the graph below).
  • There is a lot of variance among art units, so be sure to look up your particular examiner and art unit when preparing a recommendation for your client.

P.S. If you need to prepare an appeal brief, perhaps one of the 800+ samples in our prosecution document search engine might be helpful. You can even filter by which ones resulted in a notice of allowance (over 550 of them).

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