US3263748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor heat exchanger
Assignee: MINE AND SMELTER CO
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Filing: 1964-09-30
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Granted: 1966-08-02
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Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Emile J Jemal
- 👤 Donald J Drinkwater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:02
CPC Classifications
F; F28; F28F; F28F5/00; F28F5/06; F27; F27B; F27B1/00; F27B1/08; F28D; F28D11/00; F28D11/02; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A HOLLOW ROTARY CONVEYOR HEAT EXCHANGER DEVICE COMPRISING AN OUTER HOLLOW SHAFT, AN INNER SHAFT MOUNTED CONCENTRICALLY WITHIN SAID OUTER HOLLOW SHAFT, THEREBY FORMING A CAVITY BETWEEN SAID SHAFTS, A PLURALITY OF HOLLOW PADDLES RADIALLY MOUNTED ON THE EXTERIOR SURFACE OF SAID OUTER HOLLOW SHAFT AND SPACED CIRCUMFERENTIALLY AND LONGITUDINALLY ABOUT THE SURFACE OF SAID OUTER HOLLOW SHAFT ALONG A HELICAL PATH, MEANS BETWEEN SAID OUTER AND INNER SHAFTS DIVIDING SAID CAVITY INTO A PAIR OF NONCOMMUNICATING HELICAL FLUID PASSAGES, ONE OF SAID HELICAL PASSAGES FOLLOWING ALONG SAID HELICAL PATH, OPENINGS THROUGH THE WALL OF SAID OUTER SHAFT PROVIDING FLUID COMMUNICATION BETWEEN SAID ONE OF SAID HELICAL PASSAGES AND EACH OF SAID PADDLES, MEANS WITHIN SAID ONE OF SAID HELICAL
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |