US3816495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyfluorinated poly(vinyl isocyanates)
Assignee: EIDP Inc
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Filing: 1971-08-31
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Granted: 1974-06-11
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Expires: 1991-08-31
Abstract
Abstract DISCLOSED HEREIN ARE POLYHALOGENATED ISOCYANATES (INTERMEDIATES FOR POLYFLUORINATED VINYL ISOCYANATES); POLYFLUORINATED VINYL ISOCYANATES, PROCESS THEREFOR, AND HOMOPOLYMERS AND COPOLYMERS THEREOF; AND USE OF SAID POLYFLUORINATED VINYL ISOCYANATE HOMOPOLYMERS AND COPOLYMERS AS WATER AND OIL REPELLING AGENTS FOR CLOTH AND PAPER.
Inventors
- 👤 W Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:25
CPC Classifications
C; C07; C07C; C07C265/00; C08; C08F; C08F26/00; C08F26/02; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/728; D; D06; D06M; D06M13/00; D06M13/322; D06M13/345; D06M13/348; D06M13/395; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; D21H19/24
Claims Analysis
Total Claims: 0
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |