Patent US3457341A successfully refreshed from Google Patents.
US3457341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for spinning mixed filaments
Assignee: EIDP Inc
•
Filing: 1967-05-26
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Granted: 1969-07-22
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Expires: 1987-05-26
Abstract
No abstract record available.
Inventors
- 👤 William Joseph Duncan
- 👤 Charles Frank Fisher
- 👤 Frank Houston Moye
- 👤 Samuel Allen Piercy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:19
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3225534A
Cited
US3161914A
Cited
US3341891A
Cited
US3244785A
Cited
US3297807A
Cited
US3271837A
Cited
US3365873A
Cited
US3320633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |