US3632377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image transfer sheet and method
Assignee: 3M Co
•
Filing: 1969-01-06
•
Granted: 1972-01-04
•
Expires: 1989-01-06
Abstract
Abstract A copy sheet having a coating comprising a binder and a reactive water-insoluble heavy metal salt of an organic acid and capable of forming a visible image on application of a heat pattern in presence of a coreactant for said salt, the resulting image areas being physically separable from the remaining background areas in the absence of any temperature differential therebetween.
Inventors
- 👤 Donald J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:31
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38235; B41M5/025; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24909
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
22 words
The method of claim 1 wherein said metal salt is a silver salt and wherein said coreactant is a photosensitive substituted alpha-naphthol.
Claim 2
Dependent Claim
19 words
The method of claim 1 wherein said coreactant is applied to said coating from an intermediate sheet by heating.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said metal salt is a salt of silver, iron or nickel and said coreactant is included in said coating.
References Cited (Backward Citations)
US2910377A
Cited
US2916395A
Cited
US3011905A
Cited
US3260612A
Cited
US3157526A
Cited
US3287154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |