Patent US3558368A successfully refreshed from Google Patents.
US3558368A
Expired / Lapsed
US
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Textile pirn
Assignee: Alcoa Corp
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Filing: 1968-11-12
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Granted: 1971-01-26
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Expires: 1988-11-12
Abstract
Abstract A TUBULAR ALUMINUM TEXTILE PIRN HAVING A GROUND FINISHED SURFACE WITH A THIN SILICATE THEREON. THE OUTERMOST 100 ANGSTROMS OF PIRN CONTAIN AT LEAST 0.7 PERCENT SILICON.
Inventors
- 👤 Walter G Zelley
- 👤 Charles J Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:46
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/66; B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H2701/00; B65H2701/30; B65H2701/31; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/29; Y10T428/2913; Y10T428/298
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |