US1608339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying oils and the like
Assignee: Individual
•
Filing: 1923-03-03
•
Granted: 1926-11-23
•
Expires: 1943-03-03
Abstract
No abstract record available.
Inventors
- 👤 Harry M Ridge
- 👤 Hodgkinson William Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:32
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C10G29/12; C10G29/02; C10G29/04; C10G29/16
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) | 1929-11-22 | 1930-05-24 | 1930-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-11-22 | 1934-05-24 | 1934-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-11-22 | 1938-05-24 | 1938-11-23 | $7700.00 | Window Closed / Lapsed |