Patent US3862103A successfully refreshed from Google Patents.
US3862103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering polymer from its solution
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1973-11-30
•
Granted: 1975-01-21
•
Expires: 1993-11-30
Abstract
Abstract This invention relates to an apparatus and method for obtaining dry rubber from a solvent dispersion of said polymer by simultaneously feeding a water/steam mixture and the solvent dispersion to a grinding, pumping device to achieve intimate admixture, and vaporizing at least sufficient amounts of the solvent to effect separation of the polymer as a crumb, removing the water from the crumb and drying said crumb to obtain a dry polymer.
Inventors
- 👤 Everett W Campbell
- 👤 Carl E Traina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:24
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
The method of claim 1 wherein the crumb is separated from the crumb-water mixture by passing the crumb-water mixture over a screen to separate the crumb from the water and the crumb is dried to obtain a dry polymer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |