US2531134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimethyl phthalate solution of acetyl peroxide as catalyst for trifluorochloroethylene polymerization
Assignee: Wyeth Holdings LLC
•
Filing: 1946-03-12
•
Granted: 1950-11-21
•
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 17:46
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.
References Cited (Backward Citations)
US1920403A
Cited
US2071250A
Cited
US1998309A
Cited
FR796026A
Cited
GB465520A
Cited
US2362094A
Cited
US2394243A
Cited
GB578168A
Cited
US2405008A
Cited
US2392378A
Cited
US2396713A
Cited
US2420222A
Cited
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 |