US3557245A
Expired / Lapsed
US
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Polymeric antioxidants for elastomers and rubbers
Assignee: TECHNOLOGY UK
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Filing: 1967-09-11
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Granted: 1971-01-19
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Expires: 1987-09-11
Abstract
Abstract SILICONE TYPE RUBBER COMPOSITIONS ARE PROVIDED HAVING, AS THE ANTIOXIDANT, POLYMERIC MATERIAL IN WHICH THE REPEATING UNIT OF THE POLYMER CHAIN IS AN -NH- GROUP ATTACHED TO A DIFUNCTIONAL AROMATIC GROUP.
Inventors
- 👤 Leslie Nathan Phillips
- 👤 David Kenneth Thomas
- 👤 William Walter Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:06
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/026; C08L; C08L83/00; C08L83/04; C08G77/00; C08G77/04; C08G77/20
Claims Analysis
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |