US2442342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making isopropyl benzene
Assignee: Standard Oil Co
•
Filing: 1942-11-30
•
Granted: 1948-06-01
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Expires: 1962-11-30
Abstract
No abstract record available.
Inventors
- 👤 Robert E Burk
- 👤 Everett C Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:09
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; C07C2527/1213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1953702A
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US1933434A
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US2275312A
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US2343870A
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US2240134A
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US2318765A
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US2300235A
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US2324784A
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US2396966A
Cited
US2372320A
Cited
US2396965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |