Patent US3583939A successfully refreshed from Google Patents.
US3583939A
Expired / Lapsed
US
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Crosslinking of aromatic polymers with organic polysulfonazides
Assignee: Vulkor Inc
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Filing: 1969-11-14
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Granted: 1971-06-08
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Expires: 1989-11-14
Abstract
Abstract AROMATIC POLYSULFONZAIDES HAVE BEEN FOUND TO BE EFFECTIVE FOR CURING A WIDE VARIETY OF ORGANIC POLYMERS HAVING AT LEAST 20 MOL PERCNET OF AROMATIC SUBSTITION, SUCH AS POLYSTYRENE, AROMATIC POLYCARBONATES. POLY(PHENYLSILSESQUIOXANES), AROMATIC POLYESTERS, ETC. THE RESULTING CURED PRODUCTS HAVE A HIGH DEGREE OF INFUSIBILITY AND INSOLUBILITY.
Inventors
- 👤 Edgar E Bostick
- 👤 Alfred R Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:57
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08F; C08F8/00; C08F8/34; C08G; C08G75/00; C08G75/30; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31652; Y10T428/31663
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |