Patent US2477773A successfully refreshed from Google Patents.
US2477773A
Expired / Lapsed
US
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Chuck
Assignee: Celanese Corp
•
Filing: 1945-03-20
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Granted: 1949-08-02
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Expires: 1965-03-20
Abstract
No abstract record available.
Inventors
- 👤 Dimitri G Soussloff
- 👤 Herbert C Haag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/207; B23B31/2072; B23B2270/00; B23B2270/02; B23B2270/027; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1241; Y10T279/1249; Y10T279/1266; Y10T279/17; Y10T279/17411; Y10T279/17487; Y10T279/17521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1925109A
Cited
US728572A
Cited
US1236453A
Cited
US1934411A
Cited
US2270927A
Cited
US2291147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |