US3218117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene fibers and method for preparing same
Assignee: Wyeth Holdings LLC
•
Filing: 1961-08-02
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Granted: 1965-11-16
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Expires: 1981-08-02
Abstract
No abstract record available.
Inventors
- 👤 Catherine S H Chen
- 👤 Evalyn F Hosterman
- 👤 Robert F Stamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:43
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/79; C; C08; C08F; C08F255/00; C08F255/02; D06M; D06M14/00; D06M14/18; D06M14/26; D06M14/28; Y; Y10; Y10S; Y10S260/00; Y10S260/21; Y10S8/00; Y10S8/09; Y10S8/18; Y10S8/92
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
A HEAT-STABLE, DEEPLY-DYED, CHLOROMETHYLSTYRENEGRAFTED POLYPROPYLENE FIBER POSSESSING GOOD TENSILE STRENGTH, HIGH STICKING TEMPERATURES, GOOD MOISTURE REGAIN, ANTI-STATIC AND COLOR WASH-FASTNESS PROPERTIES.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |