US2934695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for indicating length of apparatus-suspending element in earth borehole
Assignee: Dresser Industries Inc
•
Filing: 1955-04-26
•
Granted: 1960-04-26
•
Expires: 1975-04-26
Abstract
No abstract record available.
Inventors
- 👤 Robert M Maulsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:37
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2477099A
Cited
US1797864A
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US2065119A
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US2025118A
Cited
US2466251A
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US2581209A
Cited
US2778991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |