Patent US1472042A successfully refreshed from Google Patents.
Patent US3623237A successfully refreshed from Google Patents.
US3623237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outer covers for the rollers of machines for the treatment of materials in web form
Assignee: Greenbank Engineering Co Ltd
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Filing: 1970-04-21
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Granted: 1971-11-30
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Expires: 1990-04-21
Abstract
Abstract A MACHINE FOR THE TREATMENT OF MATERIAL IN WEB FORM WITH HUMIDIFIED AIR OR STEAM CONSTRUCTED WITH A TOP AND ENDS FORMING A FRAME COMPRISING A PLURALITY OF RECTANGULAR OR SQUARE FRAME ELEMENTS WELDED TOGETHER, EACH FORMED OF A PLURALITY OF TUBES FOR THE PASSAGE OF THE HEATED FLUID ADJACENT FRAME ELEMENTS BEING CONNECTED BY CROSS OVER PIPES TO CONVEY THE FLUID FROM ONE ELEMENTS TO AN ADJACENT ELEMENT.
Inventors
- 👤 Jack D Whittaker
- 👤 Harry W Loveday
- 👤 Denis R Barbour
- 👤 William Tweedie
- 👤 George S Dryden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:24
CPC Classifications
D; D06; D06B; D06B1/00; D06C; D06C2700/00; D06C2700/13; D06C2700/135
Claims Analysis
Total Claims: 0
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |