US2333548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing tetra hydroxyphenyl alkanes
Assignee: Individual
•
Filing: 1940-05-08
•
Granted: 1943-11-02
•
Expires: 1960-05-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Niederl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/12; C07C39/14; C07C37/00; C07C37/11; C07C37/20; C07C39/15
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) | 1946-11-01 | 1947-05-03 | 1947-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-01 | 1951-05-03 | 1951-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-01 | 1955-05-03 | 1955-11-02 | $7700.00 | Window Closed / Lapsed |