US2358979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of lactones and phenols from pyroligneous acid
Assignee: Danciger Oil & Refineries Inc
•
Filing: 1940-03-26
•
Granted: 1944-09-26
•
Expires: 1960-03-26
Abstract
No abstract record available.
Inventors
- 👤 Robert M Isham
- 👤 Spring Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:34
CPC Classifications
C; C07; C07D; C07D315/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1947-09-26 | 1948-03-27 | 1948-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-09-26 | 1952-03-27 | 1952-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-09-26 | 1956-03-27 | 1956-09-26 | $7700.00 | Window Closed / Lapsed |