US3518237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene copolymerisation catalyst
Assignee: International Synthetic Rubber Co Ltd
•
Filing: 1967-10-09
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Granted: 1970-06-30
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Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Edward William Duck
- 👤 David Page Grieve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:45
CPC Classifications
C; C08; C08F; C08F10/00; C08F210/00; C08F210/02; C08F210/04; C08F210/06; C08F210/14; C08F210/16; C08F210/18; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/68; C08F2500/00; C08F2500/03; C08F2500/17; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3299025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |