US2135368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing quinone
Assignee: Individual
•
Filing: 1934-10-10
•
Granted: 1938-11-01
•
Expires: 1954-10-10
Abstract
No abstract record available.
Inventors
- 👤 Vagenius Nels Harold
- 👤 Rollo J Kidd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:08
CPC Classifications
C; C07; C07C; C07C46/00; C07C46/02; C07C46/06; C25; C25B; C25B3/00; C25B3/01; C25B3/07; C25B3/20; C25B3/23
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) | 1941-10-31 | 1942-05-02 | 1942-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-31 | 1946-05-02 | 1946-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-31 | 1950-05-02 | 1950-11-01 | $7700.00 | Window Closed / Lapsed |