Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6012395 | Baton projectile A baton projetile comprises a case (1) of low density polyethylene, and a core (2) of a soft material such as a thermoplastic gel modified rubber. An air gap (4) is optionally formed at the front end of the baton projectile between the core (2) and the ca... | 01/11/2000 |
| 5962805 | Gas cartridge A cartridge has a case comprising a body housed telescopically within a sleeve. The body encloses a main chamber which contains gas under pressure, and a valve mechanism for venting gas from the chamber into an expansion chamber. The pressure of the gas i... | 10/05/1999 |
| 5700972 | Gas cartridge A cartridge has a case comprising a body (10) housed telescopically within a sleeve (14). The body encloses a main chamber (21) which contains gas under pressure, and a valve mechanism for venting gas from the chamber (21) into an expansion chamber (61). ... | 12/23/1997 |
| 5654524 | Target marking bullet A projectile has a hollow casing (1, 2) with a perforated nose portion (11), a piston (3) disposed within the casing, and a marking substance (4) disposed forwardly of the piston. The piston (3) is movable forwardly under force applied to it by gas used t... | 08/05/1997 |
