US2806295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical borehole surveying device
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-09-01
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Granted: 1957-09-17
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Expires: 1975-09-01
Abstract
No abstract record available.
Inventors
- 👤 John D Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:59
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/022; E21B47/0236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A BOREHOLE SURVEYING DEVICE INCLUDING: A HOUSING ADAPTED TO BE LOWERED INTO SAID BOREHOLD; A PENDULOUS WEIGHT OF MAGNETIC MATERIAL FREELY SUSPENDED WITHIN SAID
Claim 2
Dependent Claim
24 words
A BOREHOLE SURVEYING DEVICE INCLUDING: A HOUSING ADAPTED TO BE LOWERED INTO SAID BOREHOLD; A PENDULOUS WEIGHT OF MAGNETIC MATERIAL FREELY SUSPENDED WITHIN SAID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |