Patent DE830433C successfully refreshed from Google Patents.
Patent US2151680A successfully refreshed from Google Patents.
US2151680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tri-(4-tertiary-alkyl-1.2-phenylene) phosphates
Assignee: Dow Chemical Co
•
Filing: 1938-03-28
•
Granted: 1939-03-28
•
Expires: 1958-03-28
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Clarence L Moyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:44
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C07F9/65746
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) | 1942-03-27 | 1942-09-26 | 1943-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-27 | 1946-09-26 | 1947-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-27 | 1950-09-26 | 1951-03-28 | $7700.00 | Window Closed / Lapsed |