US3666398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dyeing shaped organic materials from liquid ammonia dye baths
Assignee: JOSEPH P TRATNYEK
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Filing: 1971-02-01
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Granted: 1972-05-30
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Expires: 1991-02-01
Abstract
Abstract A DYE STSTEM IN WHICH MATERIALS ARE BATHED IN A DYEBATH FORMED OF A DYE DISSOLVED IN SUBSTATIALLY ANHYDROUS LIQUID AMMONIA.
Inventors
- 👤 Joseph P Tratnyek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:54
CPC Classifications
D; D06; D06P; D06P3/00; D06P1/00; D06P1/81; D06P1/90; D06P1/92; D06P1/928
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |