Patent US3524819A successfully refreshed from Google Patents.
US3524819A
Expired / Lapsed
US
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Steam reforming of hydrocarbons
Assignee: Lummus Technology LLC
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Filing: 1967-03-03
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Granted: 1970-08-18
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Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Salvatore A Guerrieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:58
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/24; C01B3/28; B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836; B01J8/24; B01J8/26; B01J8/28; C01B3/32; C01B3/34; C01B3/38; C01B3/42; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |