Patent US2895171A successfully refreshed from Google Patents.
US2895171A
Expired / Lapsed
US
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Production of films from polymeric materials
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1957-06-11
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Granted: 1959-07-21
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Expires: 1977-06-11
Abstract
No abstract record available.
Inventors
- 👤 Holmes-Walker William Anthony
- 👤 Sandiford Denis James Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:21
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/08; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2233442A
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US2309370A
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US2412187A
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US2497376A
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US2618012A
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US2767435A
Cited
GB758450A
Cited
US2722520A
Cited
US2722492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |