US3139468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altering dimension of vulcanized transpolybutadiene and heating to cause same to appoach original shape
Assignee: Phillips Petroleum Co
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Filing: 1960-06-20
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Granted: 1964-06-30
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Expires: 1980-06-20
Abstract
No abstract record available.
Inventors
- 👤 Robert C Wheat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
B; B29; B29C; B29C35/00; F; F16; F16L; F16L47/00; F16L47/20; F16L47/22; Y; Y10; Y10S; Y10S285/00; Y10S285/909; Y10S285/91; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PROCESS WHICH COMPRISES SUBJECTING VULCANIZED POLYBUTADIENE WHICH IN ITS UNVULCANIZED STATE CONTAINS AT LEAST 75 PERCENT TRANS 1,4-ADDITION TO A FORCE SUFFICIENT TO ALTER ITS DIMENSIONS AND THEREAFTER HEATING THE VULCANIZED POLYBUTADIENE TO A TEMPERATURE OF AT LEAST 120*F., SAID HEATING CAUSING SAID VULCANIZED POLYBUTADIENE TO APPROACH ITS ORIGINAL UNALTERED DIMENSIONS.
Claim 2
Dependent Claim
52 words
A PROCESS WHICH COMPRISES SUBJECTING VULCANIZED POLYBUTADIENE WHICH IN ITS UNVULCANIZED STATE CONTAINS AT LEAST 75 PERCENT TRANS 1,4-ADDITION TO A FORCE SUFFICIENT TO ALTER ITS DIMENSIONS AND THEREAFTER HEATING THE VULCANIZED POLYBUTADIENE TO A TEMPERATURE OF AT LEAST 120*F., SAID HEATING CAUSING SAID VULCANIZED POLYBUTADIENE TO APPROACH ITS ORIGINAL UNALTERED DIMENSIONS.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |