US2874152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process employing a perfluorochlorocarboxylic acid as an emulsifying agent
Assignee: 3M Co
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Filing: 1954-10-18
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Granted: 1959-02-17
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Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Archibald N Bolstad
- 👤 Jr Ralph L Herbst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:29
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS WHICH COMPRISES POLYMERIZING AT LEAST ONE BUT NOT MORE THAN TWO HALOGENATED POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMERS IN THE PRESENCE OF A SYSTEM CONTAINING SUBSTANTIALLY NO ADDED REDUCTANT BEING MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 5 AND ABOUT 30*C. AND HAVING AN INITIAL PH BETWEEN ABOUT 6 AND 10 AND CONSISTING ESSENTIALLY OF WATERS, AN INORGANIC PEROXY COMPOUND, AND A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
65 words
A PROCESS WHICH COMPRISES POLYMERIZING AT LEAST ONE BUT NOT MORE THAN TWO HALOGENATED POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMERS IN THE PRESENCE OF A SYSTEM CONTAINING SUBSTANTIALLY NO ADDED REDUCTANT BEING MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 5 AND ABOUT 30*C. AND HAVING AN INITIAL PH BETWEEN ABOUT 6 AND 10 AND CONSISTING ESSENTIALLY OF WATERS, AN INORGANIC PEROXY COMPOUND, AND A COMPOUND HAVING THE FORMULA
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |