US2760632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticization of sulfur vulcanizable materials, and related compositions
Assignee: Phillips Petroleum Co
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Filing: 1951-01-02
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Granted: 1956-08-28
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 John C Hillyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103; Y; Y10; Y10S; Y10S220/00; Y10S220/90; Y10S220/901; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
A METHOD FOR PLASTICIZING A RUBBERY COPOLYMER OF 1,3-BUTADIENE AND ACRYLONITRILE AND CONCOMITANTLY PRODUCING A RESULTING VULCANIZABLE RUBBERY COMPOSITION WHICH WHEN VULCANIZED EXHIBITS LOW EXTRACTABILITY AND IMPROVED SWELLING CHARACTERISTICS, COMPRISING ADDING TO 100 PARTS BY WEIGHT OF SAID COPOLYMER FROM 1-25 PARTS BY WEIGHT OF AN ORGANIC ESTER SELECTED FROM THE GROUP CONSISTING OF ERYTHRITOL TETRABUTYRATE, ERYTHRITOL TETRAACETATE, ERYTHRITOL TETRAPROPIONATE, ERYTHRITOL MONOOLEATE, ERYTHRITOL TETRAOLEATE, ERYTHRITOL LAURATE, PENTAERYTHRITOL LAURATE AND GLYCEROL LAURATE, MAINTAINING THE RESULTING ADMIXTURE UNDER CONDITIONS SO AS TO UNIFORMLY MIX SAID ESTER WITH THE SAID COPOLYMER, AND RECOVERING THE SAID RUBBERY COPOLYMER IN A PLASTICIZED FORM AS PRODUCT OF THE PROCESS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |