Patent US2497376A successfully refreshed from Google Patents.
US2497376A
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US
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Process of producing films
Assignee: Imperial Chemical Industries Ltd
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Filing: 1947-03-21
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Granted: 1950-02-14
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Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 Swallow John Cuthbert
- 👤 Baird Donald Kenneth
- 👤 City Welwyn Garden
- 👤 Ridge Bertram Pusey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:18
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; A; A41; A41D; A41D31/00; B; B65; B65D; B65D65/00; B65D65/38; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/422; H01B3/423; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S264/00; Y10S264/68; Y10S8/00; Y10S8/04
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |