Patent US3682681A successfully refreshed from Google Patents.
US3682681A
Expired / Lapsed
US
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Transfer set incorporating colour reaction sheets
Assignee: Gunther Wagner Pelikan Werke GmbH
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Filing: 1970-07-23
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Granted: 1972-08-08
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Expires: 1990-07-23
Abstract
Abstract ACCORDING TO THE INVENTION A TOP SHEET AND AT LEAST ONE COPY SHEET OF A SET OF PRINTED FORMS, OR OTHER TRANSFER SET, OF COLOUR REACTION PAPER ARE INTEGRALLY JOINED ACROSS A FOLD LINE. THE COLOUR RECEIVING LAYER ON THE TOP SURFACE OF THE COPY SHEET IS ALSO APPLIED IN A SINGLE OPERATION, BEFORE THE FOLDING, THE LOWER SURFACE OF THE TOP SHEET. OVER THE RECEIVING LAYER ON THE LOWER SURFACE OF THE TOP SHEET THERE IS SUBSEQUENTLY APPLIED A LAYER OF A NEUTRALISING AGENT AND OVER THE NEUTRALISING AGENT LAYER, AT THOSE PARTS OF THE TOP SHEET WHICH ARE INTENDED FOR TRANSMITTING THE TYPED MESSAGE, A PRINTED COLOUR FORMING LAYER.
Inventors
- 👤 Ernst Kunkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:57
CPC Classifications
B; B41; B41L; B41L1/00; B41L1/20; B41L1/36; B41M; B41M5/00; B41M5/124; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |