Patent US2862244A successfully refreshed from Google Patents.
US2862244A
Expired / Lapsed
US
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Extrusion molding of copolymers of trifluorochloroethylene and vinylidene fluoride
Assignee: 3M Co
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Filing: 1955-02-28
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Granted: 1958-12-02
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Lester E Robb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/022; B29C48/05; B29C48/06; B29C48/07; B29C48/08; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A PROCESS FOR SHAPING IN AN EXTRUSION MACHINE A MATERIAL COMPRISING AN ELASTOMERIC COPOLYMER OF TRIFLUOROCHLOETHYLENE AND VINYLIDENE FLUORIDE, THE STEPS WHICH COMPRISE: HEATING SAID MATERIAL TO A TEMPERATURE BETWEEN ABOUT 70*F. AND ABOUT 190*F. WHILE MOVING SAID HEATED MATERIAL THROUGH A DIE LAND AT A TEMPERATURE BETWEEN ABOUT 70*F. AND ABOUT 190*F.
Claim 2
Dependent Claim
54 words
IN A PROCESS FOR SHAPING IN AN EXTRUSION MACHINE A MATERIAL COMPRISING AN ELASTOMERIC COPOLYMER OF TRIFLUOROCHLOETHYLENE AND VINYLIDENE FLUORIDE, THE STEPS WHICH COMPRISE: HEATING SAID MATERIAL TO A TEMPERATURE BETWEEN ABOUT 70*F. AND ABOUT 190*F. WHILE MOVING SAID HEATED MATERIAL THROUGH A DIE LAND AT A TEMPERATURE BETWEEN ABOUT 70*F. AND ABOUT 190*F.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |