Patent US2453933A successfully refreshed from Google Patents.
US2453933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of wax
Assignee: Union Oil Company of California
•
Filing: 1945-02-10
•
Granted: 1948-11-16
•
Expires: 1965-02-10
Abstract
No abstract record available.
Inventors
- 👤 Paul L Polizzotto
- 👤 Backlund Peter Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:11
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US284437A
Cited
US1848636A
Cited
US1278023A
Cited
US1392370A
Cited
US1813327A
Cited
US1951861A
Cited
US2049059A
Cited
US2121518A
Cited
US2166893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |