US3585161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing films of poly-gamma-methyl glutamate modified with urethane prepolymer having terminal isocyanate groups
Assignee: Ajinomoto Co Inc
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Filing: 1969-09-17
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Granted: 1971-06-15
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Expires: 1989-09-17
Abstract
Abstract A SOLUTION OF POLY-$-METHYL GLUTAMATE IN A CHLORINATED ALIPHATIC HYDROCARBON WHEN MODIFIED BY THE ADDITION OF A URETHANE PREPOLYMER OF A MOLECULAR WEIGHT OF 700 TO 5,000 HAVING TWO TERMINAL ISOCYANATE GROUPS FORMS A DOPE FROM WHICH FILMS AND COATINGS OF MECHANICAL PROPERITIES DESIRABLE IN ARTIFICIAL LEATHER MAY BE PREPARED.
Inventors
- 👤 Akira Akamatsu
- 👤 Kazushi Togo
- 👤 Yasuo Takagi
- 👤 Ryonosuke Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:24
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/125; D06N3/126; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/60; C08G18/603
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |