US3614843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial hair
Assignee: Akzo Nobel UK PLC
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Filing: 1968-10-31
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Granted: 1971-10-26
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Expires: 1988-10-31
Abstract
Abstract AN ARTIFICAIL HAIR PIECE COMPRISING A PLURALITY OF FILA MENTS OF SYNTHETIC OR REGENERATED POLYMERIC MATERIAL FOR EXAMPLE CELLULOSE TRIACETATE, THE FILAMENTS HAVING HOLLOW INTERIOR BY VIRTUE OF HAVING A CROSS-SECTION WHICH IS A RING OR AN OPEN OR CLOSED SPLIT-RING.
Inventors
- 👤 Selwyn G Hawtin
- 👤 Harold G Mallaban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:57
CPC Classifications
A; A41; A41G; A41G3/00; A41G3/0083
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |