US2729664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon synthesis catalyst
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1951-08-02
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Granted: 1956-01-03
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Expires: 1971-08-02
Abstract
No abstract record available.
Inventors
- 👤 Kirshenbaum Isidor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:36
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C1/0435; C07C1/044; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB300294A
Cited
US2365094A
Cited
US2414585A
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US2449071A
Cited
US2525080A
Cited
US2552347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |