Patent US2324256A successfully refreshed from Google Patents.
Patent US3584389A successfully refreshed from Google Patents.
US3584389A
Expired / Lapsed
US
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Print drying
Assignee: HIRST MICROWAVE HEATING Ltd
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Filing: 1969-02-03
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Granted: 1971-06-15
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Expires: 1989-02-03
Abstract
Abstract THE INVENTION RELATES TO METHOD AND APPARATUS FOR HEATING A DIELECTRIC MEMBER, SUCH AS FOR DRYING PRINTING INK ON PAPER, IN WHICH BOTH MICROWAVE AND INFRA-RED RADIATION ARE USED FOR HEATING. THIS ENABLES A UNIFORM RISE IN THE TEMPERATURE OF THE SURFACE OF THE MEMBER, E.G. THE COATING UP TO THE REQUIRED TEMPERATURE, E.G. THE INK DRYING TEMPERATURE, TO BE ACHIEVED.
Inventors
- 👤 Kenneth Hilton
- 👤 Sidney Hirst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:31
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B6/788; B; B41; B41F; B41F23/00; B41F23/04; B41F23/0486; B41F23/0493; F; F26; F26B; F26B3/00; F26B3/32; F26B3/34; H05B3/00; H05B3/0033; H05B3/0038; H05B3/0066; H05B2206/00; H05B2206/04; H05B2206/046
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |