Patent US4856950A successfully refreshed from Google Patents.
Patent US3753943A successfully refreshed from Google Patents.
US3753943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2-polybutadiene composition stabilized with phenolic acrylates or acrylamides
Assignee: Ube Corp
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Filing: 1971-12-21
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Granted: 1973-08-21
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Expires: 1991-12-21
Abstract
Abstract IT HAS BEEN FOUND THAT UNDESIRED DETERIORATION OF 1,2POLYBUTADIENE UNDER THE INFLUENCE OF HEAT, OXYGEN, OZONE AND LIGHT CAN BE ADVANTAGEOUSLY PREVENTED NBY THE INCORPORATION INTO 1,2-POLYBUTADIENE OF A SMALL AMOUNT OF A COMPOUND REPRESEOTED BY THE FORMULA: (4-HO,R,R''-PHENYL)-CH2-X-CO-C(-R")=CH2 WHEREIN X IS A -OCH2NH-, -NH- OR -O- GROUPS, EACH OF R AND R'' IS AN ALKYL GROUP HAVING 1 TO 4 CARBON ATOMS AND R" IS A HYDROGEN ATOM OR A METHYL GROUP.
Inventors
- 👤 H Ueno
- 👤 H Hamada
- 👤 T Watanabe
- 👤 K Imamora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |