Patent US2605502A successfully refreshed from Google Patents.
US2605502A
Expired / Lapsed
US
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Preparation of filamentary material
Assignee: Celanese Corp
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Filing: 1949-10-05
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Granted: 1952-08-05
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Expires: 1969-10-05
Abstract
No abstract record available.
Inventors
- 👤 Frank M Culpepper
- 👤 Lester W Latta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:23
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; Y; Y10; Y10S; Y10S425/00; Y10S425/815
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |