US3069400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of vinyl chloride with phosphite esters
Assignee: Hexion Inc
•
Filing: 1959-05-13
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Granted: 1962-12-18
•
Expires: 1979-05-13
Abstract
No abstract record available.
Inventors
- 👤 Benjamin D Halpern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:31
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F30/00; C08F30/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN MAKING A COPOLYMER OF VINYL CHLORIDE AND STABILIZING THE COPOLYMER AGAINST LIGHT AND HEAT DECOMPOSITION, THE PROCESS WHICH COMPRISES FORMING A MIXTURE OF THE SAID MONOMER EXCLUSIVELY IN MONOMERIC FORM, A COMONOMER IN UNPOLYMERIZED CONDITION AND IN THE PROPORTION OF 0.3%-5% OF THE WEIGHT OF THE VINYL CHLORIDE, AND AN INITIATOR OF POLYMERIZATION OF VINYL CHLORIDE AND MAINTAINING THE SAID MIXTURE AT A TEMPERATURE OF ABOUT 20*-120*C. UNTIL COPOLYMERIZATION OF VINYL CHLORIDE THE COMONOMER IS EFFECTED, THE COMONOMER BEING A TRIHYDROCARBON PHOSPHITE ESTER WHEREIN AT LEAST ONE OF THE HYDROCARBON GROUPS IS ALLYL.
Claim 2
Dependent Claim
94 words
IN MAKING A COPOLYMER OF VINYL CHLORIDE AND STABILIZING THE COPOLYMER AGAINST LIGHT AND HEAT DECOMPOSITION, THE PROCESS WHICH COMPRISES FORMING A MIXTURE OF THE SAID MONOMER EXCLUSIVELY IN MONOMERIC FORM, A COMONOMER IN UNPOLYMERIZED CONDITION AND IN THE PROPORTION OF 0.3%-5% OF THE WEIGHT OF THE VINYL CHLORIDE, AND AN INITIATOR OF POLYMERIZATION OF VINYL CHLORIDE AND MAINTAINING THE SAID MIXTURE AT A TEMPERATURE OF ABOUT 20*-120*C. UNTIL COPOLYMERIZATION OF VINYL CHLORIDE THE COMONOMER IS EFFECTED, THE COMONOMER BEING A TRIHYDROCARBON PHOSPHITE ESTER WHEREIN AT LEAST ONE OF THE HYDROCARBON GROUPS IS ALLYL.
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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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |