US2512600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear nitrogen-containing polymeric materials and processes for their production
Assignee: Celanese Corp
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Filing: 1946-04-16
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Granted: 1950-06-27
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Expires: 1966-04-16
Abstract
No abstract record available.
Inventors
- 👤 Bates Harold
- 👤 Fisher James Wotherspoon
- 👤 Wheatley Edward William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:49
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
PROCESS FOR THE PRODUCTION OF A NITROGENCONTAINING POLYMER, WHICH COMPRISES HEATING TOGETHER SEBACIC DIAMIDE AND SEBACIC DIHYDRAZIDE AND HYDRAZINE, THE TOTAL HYDRAZINE PRESENT, COMBINED AND UNCOMBINED, BEING SUFFICIENTLY MORE THAN ONE MOLE FOR EACH MOLE OF SEBACIC ACID PRESENT TO PRODUCE A POLYMER RESISTANT TO HYDROLYSIS BY HYDROCHLORIC ACID, AND CONTINUING THE HEATING UNTIL THE POLYMER HAS FIBRE-FORMING PROPERTIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |