US2837505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of fluorine-containing polymers
Assignee: 3M Co
•
Filing: 1954-05-11
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Granted: 1958-06-03
•
Expires: 1974-05-11
Abstract
No abstract record available.
Inventors
- 👤 Albert L Dittman
- 👤 Herbert J Passino
- 👤 John M Wrightson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:12
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR POLYMERIZING TRIFLUOROCHLOROETHYLENE TO PRODUCE A NORMALLY SOLID HOMOPOLYMER WHICH COMPRISES POLYMERIZING TRIFLUOROCHLOROETHYLENE MONOMER IN ADMIXTURE WITH AN AMOUNT OF WATER BETWEEN ABOUT 1 AND ABOUT 10 TIMES THE AMOUNT OF WATER BETWEEN ABOUT 1 AND CIENT TO MAINTAIN MOMONER IN THE LIQUID PHASE IN THE PRESENCE OF AN INORGANIC WATER SOLUBLE SLAT OF A WEAK PERACID AS SUBSTANTIALLY THE SOLE PROMOTING AGENT, AND MAINTAINING AN ALKALINE PH SUCH THAT A NORMALLY SOLID HOMOPOLYMER OF TRIFLUOROCHLORETHYLENE IS PRODUCED AND RECOVERING HOMOPOLYMER THUS PRODUCED AS A PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
91 words
A PROCESS FOR POLYMERIZING TRIFLUOROCHLOROETHYLENE TO PRODUCE A NORMALLY SOLID HOMOPOLYMER WHICH COMPRISES POLYMERIZING TRIFLUOROCHLOROETHYLENE MONOMER IN ADMIXTURE WITH AN AMOUNT OF WATER BETWEEN ABOUT 1 AND ABOUT 10 TIMES THE AMOUNT OF WATER BETWEEN ABOUT 1 AND CIENT TO MAINTAIN MOMONER IN THE LIQUID PHASE IN THE PRESENCE OF AN INORGANIC WATER SOLUBLE SLAT OF A WEAK PERACID AS SUBSTANTIALLY THE SOLE PROMOTING AGENT, AND MAINTAINING AN ALKALINE PH SUCH THAT A NORMALLY SOLID HOMOPOLYMER OF TRIFLUOROCHLORETHYLENE IS PRODUCED AND RECOVERING HOMOPOLYMER THUS PRODUCED AS A PRODUCT OF THE PROCESS.
References Cited (Backward Citations)
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US2296403A
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US2393967A
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US2435537A
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FR922429A
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US2531134A
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US2569524A
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US2600202A
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US2613202A
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US2689241A
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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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |