Patent US2760631A successfully refreshed from Google Patents.
US2760631A
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Assignee: CELANESE COLOMBIANA
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Filing: 1952-10-30
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Granted: 1956-08-28
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Expires: 1972-10-30
Abstract
No abstract record available.
Inventors
- 👤 William T Stearn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:41
CPC Classifications
B; B65; B65D; B65D71/00; B65D71/70; B65D5/00; B65D5/42; B65D5/44; B65D5/50; B65D5/5028; B65D5/5035; B65D5/5059
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1156074A
Cited
US1280652A
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US1362282A
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US1748256A
Cited
US1808651A
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US1950908A
Cited
US1896609A
Cited
US2008335A
Cited
GB406511A
Cited
US2185920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |