1. Analogous Arts Patent Law 3.29.04

5. Hetherington “Bladder Bags”

6. United States Patent 4,683,949 Sydansk, et al. August 4, 1987 Conformance improvement in a subterranean hydrocarbon-bearing formation using a polymer gel Conformance improvement is achieved in a subterranean hydrocarbon-bearing formation using a gel. The gel components are combined at the surface and injected into the desired treatment zone via a wellbore Inventors: Sydansk; Robert D. (Littleton, CO); Argabright; Perry A. (Larkspur, CO) Assignee: Marathon Oil Company (Findlay, OH)

8. Analogous arts: tests From same field? Pertinent to problem solved? P. 800

9. Sydansk reference Board of Appeals: same field (oil extraction) Federal Circuit: wrong! –Storage vs extraction –P. 801

10. Sydansk: Same Problem? Differences in conditions governing problem to be solved –Underground conditions different from storage tanks –P 802; PHOSITA faced with Clay’s problem would not look in oil extraction art – AGREE?

11. Counterpoint: In re Paulsen Pp. 804-805: Hinge in laptop computer claim Other mechanical arts relevant; “problem not unique to portable computers...” –Importance of problem focus

12. “General Principles” In re Mariani, 177 F.2d 293 Cust. & Pat.App. 1949 Application was properly rejected with respect to certain claims for patent for fruit juice extractor, where features claimed to be novel were not in fact novel, but were scientific necessities, or, at least, scientifically desirable and well known to those skilled in the art, and had been used in a fishing reel and in automobile jacks.