Patent US2267861A successfully refreshed from Google Patents.
Patent US3361538A successfully refreshed from Google Patents.
US3361538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube heater
Assignee: Linde GmbH
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Filing: 1964-11-13
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Granted: 1968-01-02
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Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:58
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/2425; F; F22; F22B; F22B21/00; F22B21/34; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/0015; B01J2219/00155; B01J2219/00157; B01J2219/00159
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A TUBE HEATER COMPRISING IN COMBINATION STRUCTURE FORMING THE SIDES AND ONE END WAL OF A RECTANGULAR FURNACE CHAMBER, DOOR MEANS CLOSING THE OTHER END OF SAID CHAMBER, A FLOOR FOR SAID CHAMBER RECEIVED BETWEEN SAID SIDES, A TUBE SUPPORT EXTENDING UPWARDLY FROM SAID FLOOR INTO SAID CHAMBER, A TUBE CARRIED BY SAID SUPPORT, TRACKS EXTENDING UNDER SAID STRUCTURE, A CAR MOUNTED FOR MOVEMENT ON SAID TRACKS, AND EXTENSIBLE MEANS ON SAID CAR TO SUPPORT SAID FLOOR, WHEREBY SAID FLOOR CAN BE REAISED INTO POSITION BETWEEN SAID OR LOWERED AND BE MOVED
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |