US3583953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyacyloxamidrazone solutions and the production of poly-bis-(1,2,4-triazole) products
Assignee: Glanzstoff AG
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Filing: 1968-04-05
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Granted: 1971-06-08
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Expires: 1988-04-05
Abstract
Abstract AN AQUEOUS ALKALI METAL HYDROXIDE SOLUTION IN WHICH THERE IS DISSOLVED A POLYVACYLAXAMIDRAZONE, THE RESULTING ALKALINE POLYMER SOLUTION BEING USEFUL FOR THE PRODUCTION OF HEAT-RESISTANT SHAPED PRODUCTS SUCH AS FILAMENTS, FILM, COATING AND THE LIKE. A PROCESS FOR PRODUCING THESE PRODUCTS INCLUDES THE STEPS OF FORMING THE POLYMER SOLUTION INTO A FILAMENT OR FILM IN CONTACT WITH AN ACID PRECIPITATION BATH, WASHING THE PRECIPITATE AND SUBSEQUENTLY HEATING TO A TEMPERATURE OF APPROXIMATELY 230-350*C.
Inventors
- 👤 Hans-Dieter Rupp
- 👤 Erhard Siggel
- 👤 Gerhard Meyer
- 👤 Ernst-Georg Worbs
- 👤 Michael Wallrabenstein
- 👤 Albert Schopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:31
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08G; C08G73/00; C08G73/06; C08G73/08; D; D01; D01F; D01F6/00; D01F6/58; D01F6/74; D01F6/76; C08J2379/00
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |