US2475713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil base drilling fluid and mixing oil for the same
Assignee: Oil Base Inc
•
Filing: 1947-01-10
•
Granted: 1949-07-12
•
Expires: 1967-01-10
Abstract
No abstract record available.
Inventors
- 👤 Miller George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2265962A
Cited
US2217927A
Cited
US2363499A
Cited
US2316967A
Cited
US2316968A
Cited
US2356776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |