US3832272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filaments of varying cross-sectional area
Assignee: Phillips Petroleum Co
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Filing: 1971-11-15
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Granted: 1974-08-27
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Expires: 1991-11-15
Abstract
Abstract FILAMENTS ARE PRODUCED HAVING A CROSS SECTION WITH VARIES ALONG THE LENGTH THEREOF, FOR EXAMPLE, FLAMENTS HAVING A CROSS SECTION ALTERNATING BETWEEN CIRCULAR AND MARQUISE.
Inventors
- 👤 P Hann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:33
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253; B; B29; B29C; B29C48/00; B29C48/14; D01D5/20; B29C48/03; B29C48/05; B29C48/12; B29C48/13; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2976
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |