Patent US2419277A successfully refreshed from Google Patents.
US2419277A
Expired / Lapsed
US
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Process for the production of polyamide compositions
Assignee: Celanese Corp
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Filing: 1941-07-11
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Granted: 1947-04-22
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Expires: 1961-07-11
Abstract
No abstract record available.
Inventors
- 👤 Moncrieff Robert Wighton
- 👤 Sammons Charles William
- 👤 Wheatley Edward William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:40
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; C; C08; C08K; C08K5/00; C08K5/0008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999405A
Cited
US2214442A
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US2193529A
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US2265303A
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US2158064A
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US2216835A
Cited
US2265559A
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US2265119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-21 | 1950-10-21 | 1951-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-21 | 1954-10-21 | 1955-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-21 | 1958-10-21 | 1959-04-22 | $7700.00 | Window Closed / Lapsed |