Patent US2768988A successfully refreshed from Google Patents.
US2768988A
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Vulcanization of rubber in the presence of sulfenamides
Assignee: Monsanto Chemicals Ltd
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Filing: 1952-01-02
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Granted: 1956-10-30
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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 22:13
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)
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Cited
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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 |