Patent US3738409A successfully refreshed from Google Patents.
Patent US3560423A successfully refreshed from Google Patents.
US3560423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luster of fibers containing solid particulate materials
Assignee: Wyeth Holdings LLC
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Filing: 1968-02-06
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Granted: 1971-02-02
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Expires: 1988-02-06
Abstract
Abstract A COMPOSITION USEFUL FOR THE PREPARATION OF SHAPED ARTICLES COMPRISING A SYNTHETIC ORGANIC POLYMER, A SOLVENT MEDIUM CAPABLE OF DISSOLVING SAID POLYMER, FINELY DIVIDED PARTICULATE SOLIDS COATED WITH AN ORGANIC LIQUID, SAID LIQUID BEING INSOLUBLE IN AND IMMISCIBLE WITH THE POLYMER SOLUTION. THE LIQUID COATING HAS A VISCOSITY IN THE RANGE OF FROM ABOUT EQUAL TO THE POLYMER SOLUTION VISCOSITY TO LESS THAN THAT WHICH INTERFERES WITH SHAPING. THIS COMPOISITON CAN BE WET-SPUN IN A MANNER TO PRODUCE LUSTROUS FIBERS CONTAINING THE COATED PARTICULATE SOLIDS IN AGGLOMERATE FORM.
Inventors
- 👤 Raymond Adrian Levesque
- 👤 Richard Frederick Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01D1/065; D01F; D01F1/00; D01F1/02; D01F1/10
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |