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Patent US2736946A successfully refreshed from Google Patents.
US2736946A
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Polyacrylonitrile fibers having a scaly integument
Assignee: Dow Chemical Co
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Filing: 1952-07-03
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Granted: 1956-03-06
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Expires: 1972-07-03
Abstract
No abstract record available.
Inventors
- 👤 George W Stanton
- 👤 Theodore B Lefferdink
- 👤 Thomas C Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:34
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2978
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2088558A
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US2110371A
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US2238694A
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US2302077A
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US2403437A
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US2356767A
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US2517694A
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US2432447A
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US2551175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |