Patent US3423333A successfully refreshed from Google Patents.
US3423333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isonitrile polymers
Assignee: Celanese Corp
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Filing: 1964-09-29
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Granted: 1969-01-21
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Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 Robert W Stackman
- 👤 William L Evers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:27
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C08G2261/00; C08G2261/30; C08G2261/33; C08G2261/332
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A NORMALLY SOLID POLYMER OF CYCLOHEXYL ISONITRILE, CONSISTING ESSENTIALLY OF RECURRING UNITS HAVING THE STRUCTURE.
Claim 2
Dependent Claim
15 words
A NORMALLY SOLID POLYMER OF CYCLOHEXYL ISONITRILE, CONSISTING ESSENTIALLY OF RECURRING UNITS HAVING THE STRUCTURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |