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US3485804A
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Novel aromatic polyamide from diamine containing primary amino group and secondary amino group
Assignee: Toray Industries Inc
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Filing: 1967-06-06
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Granted: 1969-12-23
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Expires: 1987-06-06
Abstract
No abstract record available.
Inventors
- 👤 Yasuro Kawabata
- 👤 Haruki Maekawa
- 👤 Masamoto Watanabe
- 👤 Yoshizo Tsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:07
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2158064A
Cited
US2953548A
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US3094511A
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US3154524A
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US3232910A
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US3296201A
Cited
US3297656A
Cited
US3354127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |