Patent US3068187A successfully refreshed from Google Patents.
US3068187A
Expired / Lapsed
US
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Process for preparing block and graft copolymers of perfluoroalkyl monomer and resulting product
Assignee: 3M Co
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Filing: 1959-08-10
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Granted: 1962-12-11
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Expires: 1979-08-10
Abstract
No abstract record available.
Inventors
- 👤 Archibald N Bolstad
- 👤 Patsy O Sherman
- 👤 Smith Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:05
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/14; C08F236/16; C08F16/00; C08F16/12; C08F16/14; C08F16/24; C08F16/36; C08F2/00; C08F261/00; C08F261/10; C08F28/00; C08F291/00; C08F293/00; C08G; C08G81/00; C08G81/02; C08G81/021; C08L; C08L51/00; C08L53/00; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/267; D06M15/277; D06M15/37; D06M15/39; D06M15/423; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/10; Y10S8/18; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2172
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SEGMENTED COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMERS COMPRISING 0.5-80 PERCENT BY WEIGHT OF AT LEAST ONE A SEGMENT COMPRISING AT LEAST FOUR POLYMERIZED UNITS OF RFP WHERE P IS RADICAL CONTAINING A POLYMERIZABLE ETHYLENIC GROUP AND RF IS A PERFLUOROALKYL RADICAL OF THE FORMULA CNF2N+1 WHERE N IS AT LEAST 4; SAID A SEGMENT CONTAINING AT LEAST 30 PERCENT BY WEIGHT OF FLUORINE DERIVED FROM SAID GROUP; AND 20-99.5 PERCENT BY WEIGHT OF AT LEAST ONE B SEGMENT WHICH COMPRISES AT LEAST 5 CONSECTIVE MONOMERIC UNITS OF A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER DIFFERENT FROM SAID FLUORINE-CONTAINING MONOMERIC UNITS: SAID B SEGMENT CONTAINING LESS THAN 10 PERCENT BY WEIGHT OF FLUORINE DERIVED FROM SAID RF.
Claim 2
Dependent Claim
120 words
A SEGMENTED COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMERS COMPRISING 0.5-80 PERCENT BY WEIGHT OF AT LEAST ONE A SEGMENT COMPRISING AT LEAST FOUR POLYMERIZED UNITS OF RFP WHERE P IS RADICAL CONTAINING A POLYMERIZABLE ETHYLENIC GROUP AND RF IS A PERFLUOROALKYL RADICAL OF THE FORMULA CNF2N+1 WHERE N IS AT LEAST 4; SAID A SEGMENT CONTAINING AT LEAST 30 PERCENT BY WEIGHT OF FLUORINE DERIVED FROM SAID GROUP; AND 20-99.5 PERCENT BY WEIGHT OF AT LEAST ONE B SEGMENT WHICH COMPRISES AT LEAST 5 CONSECTIVE MONOMERIC UNITS OF A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER DIFFERENT FROM SAID FLUORINE-CONTAINING MONOMERIC UNITS: SAID B SEGMENT CONTAINING LESS THAN 10 PERCENT BY WEIGHT OF FLUORINE DERIVED FROM SAID RF.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |