US2880373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling gas pressure
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1953-12-21
•
Granted: 1959-03-31
•
Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Soloway Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:38
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02; H01J27/16; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2066; H01J17/00; H01J17/02; H01J17/22; H01J17/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB191509233A
Cited
US1334143A
Cited
US1778508A
Cited
US2056464A
Cited
GB619133A
Cited
US2454564A
Cited
US2504772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |