Patent US4322796A successfully refreshed from Google Patents.
Patent US3119604A successfully refreshed from Google Patents.
US3119604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heating apparatus
Assignee: Gulf Research and Development Co
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Filing: 1961-12-28
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Granted: 1964-01-28
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Biber Albert
- 👤 William E Kramer
- 👤 Bruce R Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:30
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/001; D; D06; D06F; D06F58/00; D06F58/20; D06F58/26; F23; F23D; F23D11/00; F23D11/10; F23D11/101; F23D11/105; F26B11/00; F26B11/18; F26B11/181; F26B11/182
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
AN APPARATUS COMPRISING A FIRST CONDUIT HAVING AN UPSTREAM END, A DOWNSTREAM END AND A SIDE OPENING, MEANS FOR INDUCING FLOW THROUGH SAID FIRST CONDUIT FROM SAID UPSTREAM END TO SAID DOWNSTREAM END, A SECOND CONDUIT JOINING SAID FIRST CONDUIT AT SAID SIDE OPENING, AN ELONGATED CHANNEL HAVING AN OPEN TOP AND HAVING A CONFIGURATION AS IS FORMED BY LONGITUDINALLY SPLITTING AN ELONGATED SUBSTANTIALLY CYLINDRICAL TUBE ALONG ITS AXIS, SAID CHANNEL DISPOSED LONGITUDINALLY WITHIN SAID SECOND CONDUIT WITH A PORTION OF SAID CHANNEL PROJECTING INTO SAID FIRST CONDUIT, SAID CHANNEL DISPOSED SO THAT THE PORTION OF SAID OPEN TOP PROJECTING INTO SAID FIRST CONDUIT FACES IN A DOWNSTREAM DIRECTION IN SAID FIRST CONDUIT.
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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |