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Patent US2541012A successfully refreshed from Google Patents.
US2541012A
Expired / Lapsed
US
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Method of preparing a viscous cellulose acetate solution
Assignee: Eastman Kodak Co
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Filing: 1947-08-06
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Granted: 1951-02-13
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Expires: 1967-08-06
Abstract
No abstract record available.
Inventors
- 👤 Richard W Bruins
- 👤 Jr Walker F Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:14
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1578802A
Cited
US1562870A
Cited
US1752853A
Cited
US1976535A
Cited
US2046554A
Cited
US2353991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |