US3790549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminally reactive polymers
Assignee: Polysar Ltd
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Filing: 1971-09-10
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Granted: 1974-02-05
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Expires: 1991-09-10
Abstract
Abstract TERMINALLY REACTIVE POLYMERS ARE PRODUCED BY OZONIZING HIGH MOLECULAR WEIGHT POLYMERS OF BRANCHED CONJUGATED DIOLEFINS SUCH AS ISOPRENE AND REACTING THE OZONIZED PRODUCTS WITH MODIFYING COMPOUNDS SUCH AS HYDRAZINE, HYDROXYLAMINE AND DIHYDRAZINO COMPOUNDS. THE REACTIVE POLYMERS ARE LOW MOLECULAR WEIGHT MATERIALS HAVING TERMINAL HYDRAZONE, OXIME AND HYDRAZOLE GROUPS; THEY REACT WITH POLYFUNCTIONAL COMPOUNDS SUCH AS DIISOCYANATES OR EPOXY RESINS TO FORM CROSS-LINKED STRUCTURES.
Inventors
- 👤 G Feniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:17
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/08
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |