Affidavits or declarations are used to:
overcome prior art rejections, pre- and post-AIA; and
traversing rejections
37 CFR 1.130a
Affidavit to overcome rejections as ‘own work’ under 102b1a or b2a
1.130a - ATTRIBUTION
37 CFR 1.130b
Affidavit to overcome rejection from work of third parties under 102b1b or b2b
1.130b - Beat the Date of Another
37 CFR 1.132
Used for traversing rejections or objections
37 CFR 1.131