Patent US2902774A successfully refreshed from Google Patents.
US2902774A
Expired / Lapsed
US
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Tempered turbulence roll-type drier
Assignee: HOT OIL HEATER Co Inc
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Filing: 1955-12-02
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Granted: 1959-09-08
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Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Swaney Robert Casper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:13
CPC Classifications
F; F28; F28F; F28F5/00; F28F5/02; D; D21; D21F; D21F5/00; D21F5/02; D21F5/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |