US3240757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of 3, 3, 3-trifluoro-2-trifluoromethyl propene and vinyl monomers
Assignee: Dow Chemical Co
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Filing: 1961-04-26
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Granted: 1966-03-15
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Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 George B Sterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A COPOLYMER OF FROM ABOUT 2 TO ABOUT 65 PERCENT BY WEIGHT OF 3,3,3-TRIFLUORO-2-TRIFLUOROMETHYLPROPENE AND CORRESPONDINGLY FROM 98 TO 35 PERCENT BY WEIGHT OF AT LEAST ONE MONOMER SELECTED FROM THE GROUP CONSISTING OF (A) VINYL ESTERS HAVING THE GENERAL FORMULA: H2C=CH-OOC-R WHEREIN R REPRESENTS A LOWER ALKYL RADICAL CONTAINING FROM 1 TO 7 CARBON ATOMS, (B) VINYL ETHERS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
63 words
A COPOLYMER OF FROM ABOUT 2 TO ABOUT 65 PERCENT BY WEIGHT OF 3,3,3-TRIFLUORO-2-TRIFLUOROMETHYLPROPENE AND CORRESPONDINGLY FROM 98 TO 35 PERCENT BY WEIGHT OF AT LEAST ONE MONOMER SELECTED FROM THE GROUP CONSISTING OF (A) VINYL ESTERS HAVING THE GENERAL FORMULA: H2C=CH-OOC-R WHEREIN R REPRESENTS A LOWER ALKYL RADICAL CONTAINING FROM 1 TO 7 CARBON ATOMS, (B) VINYL ETHERS HAVING THE GENERAL 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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |