US3564651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-stick fluorocarbon resin-surfaced mixing element
Assignee: EIDP Inc
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Filing: 1968-04-29
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Granted: 1971-02-23
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Expires: 1988-04-29
Abstract
Abstract MIXING ELEMENTS OF ELASTOMER EXTRUDERS HAVING A NONCURTAILING PRODUCT INHOMOGENIETY DURING SULFUR HALIDE MODIFICATION OF SULFUR-CURABLE ELASTOMERS. THE FLUOROCARBON RESIN COMPRISES TETRAFLUOROETHYLENE HOMOPOLYMERS OR TETRAFLUOROETHYLENE-HEXAFLUOROPROPYLENE COPOLYMERS.
Inventors
- 👤 Robert A Covington Jr
- 👤 Henry M Mittelhauser Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:00
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/507; B29C48/509; B29C48/03; Y; Y10; Y10S; Y10S425/00; Y10S425/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |