US2439814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimped artificial filament
Assignee: Akzo Nobel UK PLC
•
Filing: 1943-05-13
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Granted: 1948-04-20
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Expires: 1963-05-13
Abstract
No abstract record available.
Inventors
- 👤 Wayne A Sisson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/32; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2973
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1611001A
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US1867298A
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FR797779A
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US2209919A
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US2238694A
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NL51307C
Cited
FR837555A
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US2310785A
Cited
US2297585A
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US2328074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |