US3404204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing high-shrinkage acrylic fibers
Assignee: Wyeth Holdings LLC
•
Filing: 1965-03-01
•
Granted: 1968-10-01
•
Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Nakagawa Kazumi
- 👤 Miyashita Koji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:07
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2716586A
Cited
US2883260A
Cited
US2984912A
Cited
US3088793A
Cited
US2988420A
Cited
US3110548A
Cited
US3182106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |