Patent US3550772A successfully refreshed from Google Patents.
Patent US2673022A successfully refreshed from Google Patents.
US2673022A
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Assignee: Celanese Corp
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Filing: 1950-01-04
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Granted: 1954-03-23
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Expires: 1970-01-04
Abstract
No abstract record available.
Inventors
- 👤 Louis F Prossen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:04
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/44; B65D5/441; B65D5/445; B65D19/00; B65D19/02; B65D19/06; B65D19/20; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00019; B65D2519/00119; B65D2519/00124; B65D2519/00154; B65D2519/00159; B65D2519/00189; B65D2519/00194; B65D2519/00258; B65D2519/00263; B65D2519/00273; B65D2519/00313; B65D2519/00323; B65D2519/00328; B65D2519/00338; B65D2519/00398; B65D2519/00432; B65D2519/00492; B65D2519/00497; B65D2519/00547; B65D2519/00577; B65D2519/00616; B65D2519/00621; B65D2519/00636; B65D2519/00666; B65D2519/00706; B65D2519/00711
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |