US3788875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer copy process and material
Assignee: W Koreska GmbH
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Filing: 1971-07-16
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Granted: 1974-01-29
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Expires: 1991-07-16
Abstract
Abstract AN UPPER SHEET AND A LOWER SHEET, ADAPTED TO BE SUPERIMPOSED TO FORM AN INTERFACE BETWEEN THE SHEETS, ARE COATED ON SAID INTERFACE WITH RESPECTIVE INGREDIENTS FOR A HEATINDUCED, COLOR-PRODUCING CHEMICAL REACTION. THE TRANSFER LAYER HAS A SYNTHETIC-RESIN BODY WHILE THE RECEPTOR LAYER HAS A WAX BASE WITH A SOFTENING POINT BELOW THE ACTIVATION TEMPERATURE OF THE REACTION.
Inventors
- 👤 W Schutzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; Y; Y10; Y10S; Y10S430/00; Y10S430/165; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |