US2721185A
Expired / Lapsed
US
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Vulcanized liquid polymers as rubber plasticizers
Assignee: Phillips Petroleum Co
•
Filing: 1951-01-02
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Granted: 1955-10-18
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
C; C08; C08L; C08L21/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/1081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE COMPOSITION OF CLAIM 14 WHEREIN SAID VULCANIZABLE ELASTOMER IS NATURAL RUBBER.
Claim 2
Dependent Claim
62 words
A SULFUR VULCANIZABLE COMPOSITION COMPRISING 100 PARTS BY WEIGHT OF A VULCANIZABLE ORGANIC ELASTOMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, DIOLEFIN POLYMERS AND COPOLYMERS OF DIOLEFINS AND COMONOMERS CONTAINING THE TERMINAL GROUP CH2=C< AND 1 TO 25 PARTS BY WEIGHT OF A SULFUR VULCANIZED POLYMER PREPARED FROM UNVULCANIZED LIQUID POLYMERS SELECTED FROM THE GROUP CONCOMONOMERS CONTAINING THE TERMINAL GROUP CH2=C<.
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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |