US2768988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization of rubber in the presence of sulfenamides
Assignee: Monsanto Chemicals Ltd
•
Filing: 1952-01-02
•
Granted: 1956-10-30
•
Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 Chester W Christensen
- 👤 Richard O Zerbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
IN THE PROCESS OF VULCANIZING A SULFUR VULCANIZABLE RUBBER BY HEATING THE RUBBER IN THE PRESENCE OF ORGANIC ACCELERATOR AND A VULCANIZING AGENT CONSISTING OF ELEMENTAL SULFUR, THE IMPROVEMENT WHEREIN THE ORGANIC ACCELERATOR CONSISTS OF A SMALL AMOUNT OF A COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
45 words
IN THE PROCESS OF VULCANIZING A SULFUR VULCANIZABLE RUBBER BY HEATING THE RUBBER IN THE PRESENCE OF ORGANIC ACCELERATOR AND A VULCANIZING AGENT CONSISTING OF ELEMENTAL SULFUR, THE IMPROVEMENT WHEREIN THE ORGANIC ACCELERATOR CONSISTS OF A SMALL AMOUNT OF A COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
USRE19286E
Cited
US2284578A
Cited
US2338864A
Cited
US2445722A
Cited
US2582829A
Cited
US2560045A
Cited
US2581936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |