US2565812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of rubber products
Assignee: Phillips Petroleum Co
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Filing: 1948-10-18
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Granted: 1951-08-28
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Expires: 1968-10-18
Abstract
No abstract record available.
Inventors
- 👤 Harbison Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:44
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
IN THE PROCESS OF MAKING RUBBER PRODUCTS WHEREIN THE RUBBER MIX, CONTAINING AN ORGANIC ACCELERATOR OF VULCANIZATION, SULFUR AND FROM 10 TO 65 PARTS OF A FURNACE CARBON BLACK HAVING A PH OF FROM 8.6 TO 10.5 PER 100 PARTS OF RUBBER, IS PREFORMED AND VULCANIZED, THAT IMPROVEMENT OF RETARDING VULCANIZATION WHICH CONSISTS OF ADDING ZINC CHLORIDE AS THE RETARDER TO SAID RUBBER MIX IN AN AMOUNT OF FROM 0.5 TO 3.5 PARTS PER 100 PARTS OF RUBBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |