US3436372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-acid and polyimide polymers crosslinked with selected hydrazines and hydrazides
Assignee: EIDP Inc
•
Filing: 1966-05-02
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Granted: 1969-04-01
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Expires: 1986-05-02
Abstract
No abstract record available.
Inventors
- 👤 Erhard F Hoegger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:47
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1075; C08G73/1082; C08G73/1003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3360502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |