US3672847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reformer furnace
Assignee: Linde GmbH
•
Filing: 1970-03-05
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Granted: 1972-06-27
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Expires: 1990-03-05
Abstract
Abstract THIS INVENTION RELATES TO A HYDROCARBON STEAM REFORMING FURNACE IN WHICH THE REFORMING TUBES ARE COATED ON THEIR INNER SURFACES WITH A CATALYST. THIS PERMITS THE USE OF TUBES THAT ARE SMALLER IN DIAMETER AND LONGER THAN USUAL, AND PERMITS THE TUBES IN THIS TYPE OF FURNACE TO BE BENT INTO COILS.
Inventors
- 👤 Abraham J Esselink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:08
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/062; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/384; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |