US2804447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizing chloroprene rubber with the aid of nu, nu' di (oxydiethylene) thiourea
Assignee: Wyeth Holdings LLC
•
Filing: 1954-02-26
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Granted: 1957-08-27
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Expires: 1974-02-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR IMPROVING THE MODULUS, TENSILE STRENGTH AND ELONGATION OF CHLOROPRENE RUBBER COMPOSITIONS WHICH COMPRISE THE STEPS OF: INCORPORATING A SMALL AMOUNT OF BETWEEN 0.25% AND 2.5% OF N,N'' DI(OXYDIETHYLENE)-THIOUREA INTO AN UNVULCANIZED VULCANIZABLE CHLOROPRENE RUBBER, AND CURING SAID COMPOSITION AT VULCANIZATIOIN TEMPERATURES.
Claim 2
Dependent Claim
44 words
A PROCESS FOR IMPROVING THE MODULUS, TENSILE STRENGTH AND ELONGATION OF CHLOROPRENE RUBBER COMPOSITIONS WHICH COMPRISE THE STEPS OF: INCORPORATING A SMALL AMOUNT OF BETWEEN 0.25% AND 2.5% OF N,N'' DI(OXYDIETHYLENE)-THIOUREA INTO AN UNVULCANIZED VULCANIZABLE CHLOROPRENE RUBBER, AND CURING SAID COMPOSITION AT VULCANIZATIOIN TEMPERATURES.
References Cited (Backward Citations)
US2544746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |