US3397427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed vented insert spinneret
Assignee: EIDP Inc
•
Filing: 1966-09-27
•
Granted: 1968-08-20
•
Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Jr James De Jarnette Burke
- 👤 Hawkins Curtis Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:26
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; Y; Y10; Y10S; Y10S425/00; Y10S425/217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH272802A
Cited
US3014237A
Cited
US3081490A
Cited
US3121254A
Cited
US3075242A
Cited
GB972932A
Cited
US3197812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |