Patent US3676189A successfully refreshed from Google Patents.
US3676189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating a polyolefin or polyolefin-coated paper sheet material
Assignee: Curtis Fine Paper Holdings Ltd
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Filing: 1970-08-07
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Granted: 1972-07-11
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Expires: 1990-08-07
Abstract
Abstract THE INVENTION CONCERNS A POLYOLEFIN SURFACE TREATED WITH A COATING OF AN ACIDIC COMPOSITION WHICH COMPRISES AQUEOUS SILICA SOL, AN ACID STABLE WATER INSOLUBLE FILM FORMING MATERIAL, SURFACE AGENTS TO KEEP THE FILM FORMING MATERIAL AS A STABLE SUSPENSION IN THE COMPOSITION, AND AN ACID. THE COMPOSITION IS COATED ONTO THE POLYOLEFIN AS AN AQUEOUS COMPOSITION AND DRIED. THE TREATMENT RENDERS THE POLYOLEFIN SURFACE ADHERENT TO, FOR EXAMPLE, PHOTOGRAPH EMULSION, PRINTING INKS AND ADHESIVES.
Inventors
- 👤 Anthony Ian Woodward
- 👤 Angus John Challis Purdie
- 👤 Anthony Paul Way
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:22
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79; G03C1/91; G03C1/93
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |