US2730481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization by dielectric heating using inorganic salts as heating assistants
Assignee: Celastic Corp
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Filing: 1952-10-29
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Granted: 1956-01-10
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Expires: 1972-10-29
Abstract
No abstract record available.
Inventors
- 👤 Bruce F Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:17
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/267; D06M14/00; D06M14/02; D06M14/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR STIFFENING A FLANNEL MATERIAL WHICH COMPRISES IMPREGNATING SAID FLANNEL WITH A SOLUTION OF A MIXTURE OF POLYETHELENE GLYCOL DIMETHACRYLATE AND A COPOLYMER OF VINYLCHLORIDE AND VINYLACETATE, SAID SOLUTION CONTAINING A CATALYTIC AMOUNT OF BENZOYL PEROXIDE AND ABOUT 10%, BASED ON THE POLYETHYLENE GLYCOL DIMETHACRYLATE, OF ZINC CHLORIDE, AND THEREAFTER SUBJECTING THE
Claim 2
Dependent Claim
54 words
A PROCESS FOR STIFFENING A FLANNEL MATERIAL WHICH COMPRISES IMPREGNATING SAID FLANNEL WITH A SOLUTION OF A MIXTURE OF POLYETHELENE GLYCOL DIMETHACRYLATE AND A COPOLYMER OF VINYLCHLORIDE AND VINYLACETATE, SAID SOLUTION CONTAINING A CATALYTIC AMOUNT OF BENZOYL PEROXIDE AND ABOUT 10%, BASED ON THE POLYETHYLENE GLYCOL DIMETHACRYLATE, OF ZINC CHLORIDE, AND THEREAFTER SUBJECTING THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |