Patent US2637893A successfully refreshed from Google Patents.
US2637893A
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Artificial filament
Assignee: Individual
•
Filing: 1949-03-12
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Granted: 1953-05-12
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Expires: 1969-03-12
Abstract
No abstract record available.
Inventors
- 👤 Shaw Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:20
CPC Classifications
A; A46; A46D; A46D1/00; A46D1/02; A46D1/0238; D; D01; D01D; D01D5/00; D01D5/253; Y; Y10; Y10S; Y10S273/00; Y10S273/06; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL8490C
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DE430741C
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US1773969A
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US2071251A
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US2002153A
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US2152826A
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US2161766A
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US2294894A
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US2433325A
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US2508799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |