US3451949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for reforming hydrocarbons
Assignee: Individual
•
Filing: 1964-01-10
•
Granted: 1969-06-24
•
Expires: 1984-01-10
Abstract
No abstract record available.
Inventors
- 👤 Haldor Frederik Axel Topsoe
- 👤 Emil Sorensen
- 👤 Erik Mogensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:25
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; C01B3/40; C10; C10G; C10G11/00; C10G11/02; C10G11/10; B01J37/00; B01J37/02; B01J37/0201; C01B2203/00; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y10; Y10S; Y10S502/00; Y10S502/524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2013066A
Cited
US1959189A
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US2151329A
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US3186797A
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US3271325A
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US3256207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |