Patent US3130183A successfully refreshed from Google Patents.
US3130183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydrazides from oxalic acid dihydrazides and aromatic dicarboxylic acid halides
Assignee: EIDP Inc
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Filing: 1960-09-06
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Granted: 1964-04-21
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Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Frazer August Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:09
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A HIGH MOLECULAR WEIGHT, FIBER AND FILM-FORMING CONDENSATION POLYMER CONSISTING ESSENTIALLY OF THE FOLLOWING RECURRING STRUCTURAL UNIT
Claim 2
Dependent Claim
17 words
A HIGH MOLECULAR WEIGHT, FIBER AND FILM-FORMING CONDENSATION POLYMER CONSISTING ESSENTIALLY OF THE FOLLOWING RECURRING STRUCTURAL UNIT
References Cited (Backward Citations)
US2252555A
Cited
US2395642A
Cited
US2615862A
Cited
US2544637A
Cited
US2958677A
Cited
US2957852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |