US3178399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine-containing polymers and preparation thereof
Assignee: 3M Co
•
Filing: 1961-08-10
•
Granted: 1965-04-13
•
Expires: 1981-08-10
Abstract
No abstract record available.
Inventors
- 👤 Elizabeth S Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:49
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A NOVEL THERMOPLASTIC AND AT LEAST PARTIALLY CRYSTALLINE COPOLYMER CONSISTING ESSENTIALLY OF BETWEEN 87 AND 99 MOL PERCENT VINYLIDENE FLUORIDE AND BETWEEN 1 AND 13 MOL PERCENT OF A MEMBER SELECTED FROMTHE GROUP CONSISTING OF HEXAFLUOROPROPENE AND OMEGA-HYDROPERFLUOROPROPENE, THE PRODUCT OF THE TENSILE STRENGTH (P.S.I.G.) AND PERCENT REVERSIBLE ELONGATION OF SAID COPOLYMER BEING AT LEAST 1,000,000.
Claim 2
Dependent Claim
56 words
A NOVEL THERMOPLASTIC AND AT LEAST PARTIALLY CRYSTALLINE COPOLYMER CONSISTING ESSENTIALLY OF BETWEEN 87 AND 99 MOL PERCENT VINYLIDENE FLUORIDE AND BETWEEN 1 AND 13 MOL PERCENT OF A MEMBER SELECTED FROMTHE GROUP CONSISTING OF HEXAFLUOROPROPENE AND OMEGA-HYDROPERFLUOROPROPENE, THE PRODUCT OF THE TENSILE STRENGTH (P.S.I.G.) AND PERCENT REVERSIBLE ELONGATION OF SAID COPOLYMER BEING AT LEAST 1,000,000.
References Cited (Backward Citations)
US2435537A
Cited
US3051677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |