US3328167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy-paper
Assignee: 3M Co
•
Filing: 1959-08-10
•
Granted: 1967-06-27
•
Expires: 1979-08-10
Abstract
No abstract record available.
Inventors
- 👤 Owen Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:01
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/48; Y; Y10; Y10S; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A DUPLICATING SHEET COMPRISING A SUPPORT, A LIGHTINSENSITIVE VISIBLY HEAT-SENSITIVE THERMOGRAPHIC COATING, AND A VISIBLY LIGHT-SENSITIVE COATING INCLUDING A WATER-SOLUBLE SALT, SAID LIGHT-SENSITIVE COATING BEING CAPABLE OF FORMING VISIBLY DISTINCT INFRA-RED-ABSORPTIVE IMAGES IN THE LIGHT-STRUCK AREAS, SAID THERMOGRAPHIC COATING BEING CAPABLE OF UNDERGOING PERMANENT VISIBLE CHANGE ONLY IN SAID LIGHT-STRUCK AREAS BY THE HEATING EFFECT OBTAINED WHEN THE SHEET SO IMAGED IS BRIEFLY EXPOSED TO HIGH INTENSITY INFRARED.
Claim 2
Dependent Claim
68 words
A DUPLICATING SHEET COMPRISING A SUPPORT, A LIGHTINSENSITIVE VISIBLY HEAT-SENSITIVE THERMOGRAPHIC COATING, AND A VISIBLY LIGHT-SENSITIVE COATING INCLUDING A WATER-SOLUBLE SALT, SAID LIGHT-SENSITIVE COATING BEING CAPABLE OF FORMING VISIBLY DISTINCT INFRA-RED-ABSORPTIVE IMAGES IN THE LIGHT-STRUCK AREAS, SAID THERMOGRAPHIC COATING BEING CAPABLE OF UNDERGOING PERMANENT VISIBLE CHANGE ONLY IN SAID LIGHT-STRUCK AREAS BY THE HEATING EFFECT OBTAINED WHEN THE SHEET SO IMAGED IS BRIEFLY EXPOSED TO HIGH INTENSITY INFRARED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |