Patent US2827189A successfully refreshed from Google Patents.
Patent US4759627A successfully refreshed from Google Patents.
Patent US3004013A successfully refreshed from Google Patents.
US3004013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing finely divided polyvinyl chloride
Assignee: Detrex Corp
•
Filing: 1954-04-28
•
Granted: 1961-10-10
•
Expires: 1974-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Kircher
- 👤 Robert J Jones
- 👤 Robert F Kirz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:26
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; B; B01; B01J; B01J19/00; B01J19/18; B01J19/1862; C08F261/00; C08F261/02; C08F261/04; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/00063; B01J2219/00065; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00103; B01J2219/00162; B01J2219/00164; B01J2219/00189; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A PROCESS FOR THE MANUFACTURE OF POLYVINYL CHLORIDE BY THE SUSPENSION POLYMERIZATION OF VINYL CHLORIDE, THE STEPS WHICH COMPRISE MIXING VINYL CHLORIDE MONOMER AND LAUROYL PEROXIDE WITH POLYVINYL ALCOHOL, SAID POLYVINYL ALCOHOL BEING DISSOLVED IN WATER IN WHICH SAID MONOMER IS INSOLUBLE, BY SUBJECTING THE RESULTANT MIXTURE TO MECHANICAL FORCES SO AS TO PERMANENTLY DISPERSE THE VINYL CHLORIDE MONOMER AND LAUROYL PEROXIDE IN SAID AQUEOUS POLYVINYL ALCOHOL IN THE FORM OF A PLURALITY OF FINELY DIVIDED, PHYSICALLY DISTINCT, UNIFORM SPHERES, SUBSTANTIALLY 100% OF SAID SPHERES HAVING A PARTICLES SIZE SUCH THAT THEY
Claim 2
Dependent Claim
93 words
IN A PROCESS FOR THE MANUFACTURE OF POLYVINYL CHLORIDE BY THE SUSPENSION POLYMERIZATION OF VINYL CHLORIDE, THE STEPS WHICH COMPRISE MIXING VINYL CHLORIDE MONOMER AND LAUROYL PEROXIDE WITH POLYVINYL ALCOHOL, SAID POLYVINYL ALCOHOL BEING DISSOLVED IN WATER IN WHICH SAID MONOMER IS INSOLUBLE, BY SUBJECTING THE RESULTANT MIXTURE TO MECHANICAL FORCES SO AS TO PERMANENTLY DISPERSE THE VINYL CHLORIDE MONOMER AND LAUROYL PEROXIDE IN SAID AQUEOUS POLYVINYL ALCOHOL IN THE FORM OF A PLURALITY OF FINELY DIVIDED, PHYSICALLY DISTINCT, UNIFORM SPHERES, SUBSTANTIALLY 100% OF SAID SPHERES HAVING A PARTICLES SIZE SUCH THAT THEY
References Cited (Backward Citations)
US2194354A
Cited
US2227163A
Cited
US2332527A
Cited
US2388600A
Cited
US2375730A
Cited
US2475016A
Cited
GB639729A
Cited
US2813850A
Cited
US2674585A
Cited
US2890211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |