Patent US2828274A successfully refreshed from Google Patents.
US2828274A
Expired / Lapsed
US
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Perfluorohalocarboxylic acid ester modified solid polymer of a fluorine-containing olefin and process of preparing the same
Assignee: 3M Co
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Filing: 1955-06-29
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Granted: 1958-03-25
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Expires: 1975-06-29
Abstract
No abstract record available.
Inventors
- 👤 Lo Elizabeth Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE NOVEL COMPOSITION OF MATTER WHICH COMPRISES A MIXTURE OF A SOLID POLYMER OF A FLUORINE-CONTAINING OLEFIN HAVING NOT MORE THAN 10 CARBON ATOMS PER MOLECULE AND AN UNSATURATED ORGANIC ESTER OF A PERFLUOROHALOCARBOXYLIC ACID HAVING NOT MORE THAN TWO CARBOXYL GROUPS, THE WEIGHT RATIO OF SAID ESTER TO SAID POLYMER BEING BETWEEN ABOUT 0.0001:1 AND ABOUT 2:1.
Claim 2
Dependent Claim
58 words
THE NOVEL COMPOSITION OF MATTER WHICH COMPRISES A MIXTURE OF A SOLID POLYMER OF A FLUORINE-CONTAINING OLEFIN HAVING NOT MORE THAN 10 CARBON ATOMS PER MOLECULE AND AN UNSATURATED ORGANIC ESTER OF A PERFLUOROHALOCARBOXYLIC ACID HAVING NOT MORE THAN TWO CARBOXYL GROUPS, THE WEIGHT RATIO OF SAID ESTER TO SAID POLYMER BEING BETWEEN ABOUT 0.0001:1 AND ABOUT 2:1.
References Cited (Backward Citations)
US2559752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |