US1861999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mud fluid pressure gauge
Assignee: Individual
•
Filing: 1931-04-10
•
Granted: 1932-06-07
•
Expires: 1951-04-10
Abstract
No abstract record available.
Inventors
- 👤 Glenn H Bowlus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:19
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/024; E; E21; E21B; E21B21/00; E21B21/08; E21B47/00; E21B47/06
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) | 1935-06-07 | 1935-12-07 | 1936-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-07 | 1939-12-07 | 1940-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-07 | 1943-12-07 | 1944-06-07 | $7700.00 | Window Closed / Lapsed |