US2276274A
Expired / Lapsed
US
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Method of synthesizing hydrocarbons
Assignee: MW Kellogg Co
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Filing: 1937-08-04
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Granted: 1942-03-17
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Expires: 1957-08-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Percival C Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:59
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0455; C07C1/0425; C07C1/043; C07C1/0435; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/16; C07C2523/00; C07C2523/12; C07C2523/16; C07C2523/32; C07C2523/34; C07C2523/70; C07C2523/72; C07C2523/74; C07C2523/75; C07C2523/755; C07C2523/76; C07C2523/84; C07C2523/889
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) | 1945-03-16 | 1945-09-15 | 1946-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-16 | 1949-09-15 | 1950-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-16 | 1953-09-15 | 1954-03-17 | $7700.00 | Window Closed / Lapsed |