US2863172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for production of films
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1954-07-27
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Granted: 1958-12-09
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Expires: 1974-07-27
Abstract
No abstract record available.
Inventors
- 👤 Buteux Richard Harold Barclay
- 👤 Cornforth Jack Witherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/03; B29C48/09; B29C48/10; B29C48/885; B29C48/911; B29C48/9115; B29C48/912; B29C48/919; B29C48/903; Y; Y10; Y10S; Y10S425/00; Y10S425/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1740029A
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US2324397A
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US2423260A
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US2545300A
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US2641022A
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US2634459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |