Patent US2449775A successfully refreshed from Google Patents.
US2449775A
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Catalytic synthesis of hydrocarbons
Assignee: Hydrocarbon Research Inc
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Filing: 1946-08-24
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Granted: 1948-09-21
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Expires: 1966-08-24
Abstract
No abstract record available.
Inventors
- 👤 Hendriksen Wealtha Eloise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:20
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C1/0435; C07C1/044; B; B01; B01J; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745; C07C2527/00; C07C2527/02; C07C2527/057; C07C2527/20; C07C2527/22
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) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |