US3539378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic film materials
Assignee: Bexford Ltd
•
Filing: 1968-09-30
•
Granted: 1970-11-10
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Expires: 1988-09-30
Abstract
No abstract record available.
Inventors
- 👤 Basil Robert Shephard
- 👤 Margaret Loudon Clachan
- 👤 David Rankine Kennedy
- 👤 Richard G Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:52
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08J7/043; C08J7/046; G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2779684A
Cited
US2999016A
Cited
US2943937A
Cited
US3022192A
Cited
US3201251A
Cited
US3370951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |