Patent US2913448A successfully refreshed from Google Patents.
US2913448A
Expired / Lapsed
US
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Treatment of polymers
Assignee: Phillips Petroleum Co
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Filing: 1956-05-25
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Granted: 1959-11-17
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Expires: 1976-05-25
Abstract
No abstract record available.
Inventors
- 👤 Donald C Tabler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:56
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F10/00; C08F8/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
APROCESS WHICH COMPRISES HEATING A NORMALLY SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN OF 2 TO 8 CARBON ATOMS IN CONTACT WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA WHERE SAID COMPOUND IS MOLTEN AND THEREAFTER RECOVERING THE POLYMER.
Claim 2
Dependent Claim
44 words
APROCESS WHICH COMPRISES HEATING A NORMALLY SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN OF 2 TO 8 CARBON ATOMS IN CONTACT WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA WHERE SAID COMPOUND IS MOLTEN AND THEREAFTER RECOVERING THE POLYMER.
References Cited (Backward Citations)
US2681303A
Cited
BE533362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |