US2716642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of polyvinylchloride with lithium aluminum hydride
Assignee: Monsanto Chemicals Ltd
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Filing: 1952-09-12
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Granted: 1955-08-30
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Expires: 1972-09-12
Abstract
No abstract record available.
Inventors
- 👤 Jr John Daniel Cotman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:02
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR THE PREPARATION OF THERMOPLASTIC POLYMERIC MATERAILS CONSISTING OF A MULTIPLE CARBON-TO-CARBON CHAIN AND CONTAINING ONLY CARBON, HYDROGEN AND CHLORINE ATOMS, SAID CHLORINE ATOMS BEING RANDOMLY DISTRIBUTED ON THE CARBON-TO-CARBON CHAIN WHICH COMPRISES REACTING A HOMOPOLYMER OF VINYL CHLORIDE HAVING A DEGREE OF POLYMERIZATION IN EXCESS OF 100, WITH LITHIUM ALUMINUM HYDRIDE, SAID REACTION BEING CARRIED OUT IN SOLUTION IN AN ANHYDROUS ALIPHATIC ETHER UNDER ANHYDROUS AND OXYGENFREE CONDITIONS.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE PREPARATION OF THERMOPLASTIC POLYMERIC MATERAILS CONSISTING OF A MULTIPLE CARBON-TO-CARBON CHAIN AND CONTAINING ONLY CARBON, HYDROGEN AND CHLORINE ATOMS, SAID CHLORINE ATOMS BEING RANDOMLY DISTRIBUTED ON THE CARBON-TO-CARBON CHAIN WHICH COMPRISES REACTING A HOMOPOLYMER OF VINYL CHLORIDE HAVING A DEGREE OF POLYMERIZATION IN EXCESS OF 100, WITH LITHIUM ALUMINUM HYDRIDE, SAID REACTION BEING CARRIED OUT IN SOLUTION IN AN ANHYDROUS ALIPHATIC ETHER UNDER ANHYDROUS AND OXYGENFREE CONDITIONS.
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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |