Patent US5435660A successfully refreshed from Google Patents.
Patent US3594208A successfully refreshed from Google Patents.
US3594208A
Expired / Lapsed
US
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Heat sensitive color projection transparency blank and method of making
Assignee: 3M Co
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Filing: 1969-06-16
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Granted: 1971-07-20
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Expires: 1989-06-16
Abstract
Abstract AN INTEGRAL FILM FOR MAKING LONG-LIVED COLOR PROJECTION TRANSPARENCIES BY THERMOGRAPHIC COPYING TECHNIQUES COMPRISES A FIRST COATING OF A COLOR PROGENITOR IN A VINYL HALIDE RESIN BINDER AND A FIRMLY RETAINED HEAT-RESISTANT AND PERMANENTLY CLEAR AND TRANSPARENT SECOND COATING OF AN ACIDIC REACTANT IN A PLASTICIZED NITROCELLULOSE BINDER. D R A W I N G
Inventors
- 👤 Joseph A Wiese Jr
- 👤 John R Berg
- 👤 Donald J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:08
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333; Y; Y10; Y10S; Y10S428/00; Y10S428/913
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |