US2809944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for the reclaiming of rubber and for the production of hard rubber products and the like, and the products thereof
Assignee: U S Rubber Reclaiming Co Inc
•
Filing: 1956-06-11
•
Granted: 1957-10-15
•
Expires: 1976-06-11
Abstract
No abstract record available.
Inventors
- 👤 Edward F Sverdrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/16; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
THE PROCESS OF RECLAIMING VULCANIZED RUBBER WHICH COMPRISES MIXING SOFT VULCANIZED RUBBER WITH FROM ABOUT 2.5% TO ABOUT 20% BY WEIGHT OF FREE SULFUR, AND SUBJECTING THE SOFT VULCANIZED RUBBER IN THE PRESENCE OF THE SULFUR TO THE CONTINUOUS KNEADING ACTION OF MECHANICAL WORKING AT A TEMPERATURE OF FROM ABOUT 300*F. TO ABOUT 500*F. WHICH PLASTICIZES THE SOFT VULCANIZED RUBBER TO RECLAIM IT.
References Cited (Backward Citations)
US838419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |