US2342980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic dehydrogenation of isopropylbenzene
Assignee: Distillers Co Yeast Ltd
•
Filing: 1942-05-12
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Granted: 1944-02-29
•
Expires: 1962-05-12
Abstract
No abstract record available.
Inventors
- 👤 Stanley Herbert Muggleton
- 👤 Salt Francis Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:50
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332
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) | 1947-02-28 | 1947-08-30 | 1948-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-02-28 | 1951-08-30 | 1952-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-02-28 | 1955-08-30 | 1956-02-29 | $7700.00 | Window Closed / Lapsed |