US3758436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross linked poly narylsulphone etherse
Assignee: Individual
•
Filing: 1972-02-29
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Granted: 1973-09-11
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Expires: 1992-02-29
Abstract
Abstract A CROSS-LINKABLE COMPOSITION WHICH COMPRISES A THERMOPLASTIC POLYMER CONTAINING AROMATIC RESIDUES IN THE POLYMER CHAIN, THE POLYMER ISELF CONTAINING PER CHAIN AT LEAST TWO GROUPS OF THE FORMULA -SO2X EACH ATTACHED DIRECTLY TO AN AROMATIC CARBON ATOM, X BEING, FOR EXAMPLE, CHLORINE OR BROMINE.
Inventors
- 👤 M Jones
- 👤 B Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:36
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G61/00; C08G61/12
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |