US1531173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the prevention of petroleum emulsions in the well
Assignee: Individual
•
Filing: 1924-03-20
•
Granted: 1925-03-24
•
Expires: 1944-03-20
Abstract
No abstract record available.
Inventors
- 👤 John D Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:43
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; C09; C09K; C09K8/00; C09K8/60; C09K8/602
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) | 1928-03-23 | 1928-09-22 | 1929-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-03-23 | 1932-09-22 | 1933-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-03-23 | 1936-09-22 | 1937-03-24 | $7700.00 | Window Closed / Lapsed |