US2440761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing artificial filaments
Assignee: Akzo Nobel UK PLC
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Filing: 1946-07-01
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Granted: 1948-05-04
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Expires: 1966-07-01
Abstract
No abstract record available.
Inventors
- 👤 Wayne A Sisson
- 👤 Wesley L Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:01
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; Y; Y10; Y10S; Y10S425/00; Y10S425/217
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) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |