Patent US2914514A successfully refreshed from Google Patents.
US2914514A
Expired / Lapsed
US
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Copolymers of dichlorohexafluoro-butene
Assignee: 3M Co
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Filing: 1956-04-30
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Granted: 1959-11-24
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Elizabeth S Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:01
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/14; C08F236/16; C08F214/00; C08F214/18; C08F214/182
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
A COPOLYMER OF ABOUT 1 MOLE PERCENT TO ABOUT 30 MOLE PERCENT OF A DICHLOROHEXAFLUOROBUTENE SELECTED FROM THE GROUP CONSISTING OF 2,3-DICHLOROHEXAFLUOROBUTENE-2 AND 4,4-DICHLOROHEXAFLUOROBUTENE-1 AND CORRESPONDINGLY ABOUT 99 MOLE PERCENT AND ABOUT 70 MOLE PERCENT OF A PARTIALLY HALOGENATED 1,3-BUTADIENE SELECTED FROM THE GROUP CONSISTING OF TRIFLUOROBUTADIENE, 1,1-DIFLUORO-2METHYL-1,3-BUTADIENE, FLUOROPRENE AND CHLOROPRENE.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |