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Patent US2531134A successfully refreshed from Google Patents.
US2531134A
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Dimethyl phthalate solution of acetyl peroxide as catalyst for trifluorochloroethylene polymerization
Assignee: Wyeth Holdings LLC
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Filing: 1946-03-12
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Granted: 1950-11-21
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Expires: 1966-03-12
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
- 👤 John J Padbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:57
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F14/00; C08F14/18; C08F14/24; Y; Y10; Y10S; Y10S260/00; Y10S260/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF PRODUCING POLYMERIC TRIFLUOROCHLOROETHYLENE WHICH COMPRISES FORMING AN ADMIXTURE OF TRIFLUOROCHLOROETHYLENE AND A SMALL AMOUNT OF DIACETYL PEROXIDE, SAID DIACETYL PEROXIDE BEING INTRODUCED INTO THE SAID ADMIXTURE WHILE DISSOLVED IN DIMETHYL PHTHALATE, ALLOWING THE TRIBLUOROCHLOROETHYLENE TO POLYMERIZE WHILE ADMIXED WITH THE SAID DIACETYL PEROXIDE, AND ISOLATING POLYMERIC TRIFLUOROCHLOROETHYLENE FROM THE RESULTING MASS.
Claim 2
Independent Claim
54 words
THE METHOD OF PRODUCING POLYMERIC TRIFLUOROCHLOROETHYLENE WHICH COMPRISES FORMING AN ADMIXTURE OF TRIFLUOROCHLOROETHYLENE AND A SMALL AMOUNT OF DIACETYL PEROXIDE, SAID DIACETYL PEROXIDE BEING INTRODUCED INTO THE SAID ADMIXTURE WHILE DISSOLVED IN DIMETHYL PHTHALATE, ALLOWING THE TRIBLUOROCHLOROETHYLENE TO POLYMERIZE WHILE ADMIXED WITH THE SAID DIACETYL PEROXIDE, AND ISOLATING POLYMERIC TRIFLUOROCHLOROETHYLENE FROM THE RESULTING MASS.
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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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |