Patent DE639855C successfully refreshed from Google Patents.
US3705045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink marking compositions
Assignee: Wyeth Holdings LLC
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Filing: 1970-11-12
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Granted: 1972-12-05
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Expires: 1990-11-12
Abstract
Abstract AN INK MARKING COMPOSITION, PREPARED BY ADDING A HOT SOLUTION OF AN ACID DYE OF THE TRIARYLMETHANE OR AZO CLASS IN A SPECIFIC CLASS OF GLYCOLS WHICH INCLUDE DI-, TRI- AND TETRAETHYLENE GLYCOLS AND PROPYLENE AND HEXYLENE GYCOLS, TO A HOT SOLUTION OF A BASIC DYE OF THE DI- OR TRI-ARYLMETHANE CLASS IN WATER, AND COOLING, IS NON-DRYING, BLEEDFAST, AND SUITABLE FOR USE IN FIBER PENS, FELT AND WICK MARKERS, STAMP PADS AND METER AND RECORDING EQUIPMENT.
Inventors
- 👤 Francis Joseph Nadolski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:53
CPC Classifications
C; C09; C09D; C09D11/00
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |