Patent US3203937A successfully refreshed from Google Patents.
US3203937A
Expired / Lapsed
US
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Cross-linking ethylene polymers
Assignee: Hercules Powder Co
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Filing: 1961-03-15
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Granted: 1965-08-31
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Expires: 1981-03-15
Abstract
No abstract record available.
Inventors
- 👤 David S Breslow
- 👤 Harold M Spurlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08F; C08F8/00; C08F8/34; C08F2800/00; C08F2800/10; C08F2810/00; C08F2810/20; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS OF CROSS-LINKING A POLYMER CONTAINING AT LEAST ABOUT 25 MOLE PERCENT OF ETHYLEN WHICH COMPRISES HEATING SAID POLYMER IN THE PRESENCE OF AN AROMATIC POLYSULFONAZIDE HAVING A SOLUBILITY OF AT LEAST ABOUT 1% BY WEIGHT IN N-HEPTANE AT A TEMPERATURE OF 95*C. AND HAVING ALL OF ITS SULFONAZIDE GROUPS ATTACHED DIRECTLY TO THE AROMATIC NUCLEUS.
Claim 2
Dependent Claim
57 words
A PROCESS OF CROSS-LINKING A POLYMER CONTAINING AT LEAST ABOUT 25 MOLE PERCENT OF ETHYLEN WHICH COMPRISES HEATING SAID POLYMER IN THE PRESENCE OF AN AROMATIC POLYSULFONAZIDE HAVING A SOLUBILITY OF AT LEAST ABOUT 1% BY WEIGHT IN N-HEPTANE AT A TEMPERATURE OF 95*C. AND HAVING ALL OF ITS SULFONAZIDE GROUPS ATTACHED DIRECTLY TO THE AROMATIC NUCLEUS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |