Patent US3025284A successfully refreshed from Google Patents.
US3025284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of vinyl chloride
Assignee: Goodrich Corp
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Filing: 1958-02-03
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Granted: 1962-03-13
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Paul J George
- 👤 Marvin R Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/60; D01H5/64; C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F4/00; C08F4/06; C08F4/12; C08F4/28; C08F4/32; Y; Y10; Y10S; Y10S260/00; Y10S260/25; Y10S526/00; Y10S526/91; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR PRODUCING POLYMERIZED VINYL CHLORIDE IN THE PRESENCE OF A BORANE-HYDROPEROXIDE CATALYST SYSTEM IN CIRCUMAMBIENT FLUID MEDIA SUBSTANTIALLY INERT TO THE BORANE OF THE CATLYST SYSTEM, WHICH PROCESS COMPRISES DISPERSING IN AN AQUEOUS MEDIUM VINYL CHLORIDE, AN ALKYL BORANE HAVING 2 TO 4 CARBON ATOMS,AND A HYDROPEROXIDE OF THE FORMULA ROOH, IN WHICH R IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON RADICALS HAVING 1 TO 8 CARBON ATOMS, TO FORM WITHIN THE RESULTING AQUEOUS ADMIXTURE THE RESULTING AQUEOUS ADMIXITURE TO TEM; THEN AGITATING THE RESULTING AQUEOUS ADMIXTURE TO PERMIT THE SAID CATALYST SYSTEM TO INITIATE AND TO ACTIVATE THE POLYMERIZED OF THE VINYL CHLORIDE UNTIL A YIELD OF POLYMERIZED VINYL CHLORIDE IS ATTAINED; AND RECOVERING THE GRANULES OF POLYMERIZED VINYL CHLORIDE THUS PRODUCED.
Claim 2
Dependent Claim
128 words
A PROCESS FOR PRODUCING POLYMERIZED VINYL CHLORIDE IN THE PRESENCE OF A BORANE-HYDROPEROXIDE CATALYST SYSTEM IN CIRCUMAMBIENT FLUID MEDIA SUBSTANTIALLY INERT TO THE BORANE OF THE CATLYST SYSTEM, WHICH PROCESS COMPRISES DISPERSING IN AN AQUEOUS MEDIUM VINYL CHLORIDE, AN ALKYL BORANE HAVING 2 TO 4 CARBON ATOMS,AND A HYDROPEROXIDE OF THE FORMULA ROOH, IN WHICH R IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON RADICALS HAVING 1 TO 8 CARBON ATOMS, TO FORM WITHIN THE RESULTING AQUEOUS ADMIXTURE THE RESULTING AQUEOUS ADMIXITURE TO TEM; THEN AGITATING THE RESULTING AQUEOUS ADMIXTURE TO PERMIT THE SAID CATALYST SYSTEM TO INITIATE AND TO ACTIVATE THE POLYMERIZED OF THE VINYL CHLORIDE UNTIL A YIELD OF POLYMERIZED VINYL CHLORIDE IS ATTAINED; AND RECOVERING THE GRANULES OF POLYMERIZED VINYL CHLORIDE THUS PRODUCED.
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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |