Patent US3418287A successfully refreshed from Google Patents.
US3418287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation polymers from 1,2-cyclopropane dicarboxylic acid
Assignee: EIDP Inc
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Filing: 1963-04-29
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Granted: 1968-12-24
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Foster Peter William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:07
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A FIBER-FORMING LINEAR POLYCARBONAMIDE CONSISTING ESSENTIALLY OF RECURRING STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
13 words
A FIBER-FORMING LINEAR POLYCARBONAMIDE CONSISTING ESSENTIALLY OF RECURRING STRUCTURAL UNITS OF THE FORMULA
References Cited (Backward Citations)
US2130523A
Cited
US2163636A
Cited
US2327131A
Cited
US2913433A
Cited
US3074914A
Cited
US2931789A
Cited
US3017395A
Cited
US3192262A
Cited
US3186983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |