Patent US2514181A successfully refreshed from Google Patents.
US2514181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization process
Assignee: Bridgestone Firestone Inc
•
Filing: 1945-04-09
•
Granted: 1950-07-04
•
Expires: 1965-04-09
Abstract
No abstract record available.
Inventors
- 👤 Jr George E P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:14
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
THE METHOD OF VULCANIZING RUBBER WHICH COMPRISES HEATING THE SAME TO A CURING TEMPERATURE WITH SULFUR IN THE PRESENCE OF A SMALL AMOUNT OF AN ACCELERATOR WHICH IS A SULFENAMIDE OF THE FOLLOWING FORMULA:
Claim 2
Independent Claim
34 words
THE METHOD OF VULCANIZING RUBBER WHICH COMPRISES HEATING THE SAME TO A CURING TEMPERATURE WITH SULFUR IN THE PRESENCE OF A SMALL AMOUNT OF AN ACCELERATOR WHICH IS A SULFENAMIDE OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US1616994A
Cited
US1732486A
Cited
US2271834A
Cited
US2354427A
Cited
US2345236A
Cited
US2382793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |