Patent US1281163A successfully refreshed from Google Patents.
US3287444A
Expired / Lapsed
US
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Production of thermoplastic polymeric materials
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-12-03
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Granted: 1966-11-22
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Ennor Kenneth Stafford
- 👤 Griffin Brian Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:39
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F291/00; C08F291/02; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |