US3253341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the orientation of borehole instruments
Assignee: Dresser Industries Inc
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Filing: 1963-06-18
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Granted: 1966-05-31
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Expires: 1983-06-18
Abstract
No abstract record available.
Inventors
- 👤 Bergan Reuben Allard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:53
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/024
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
APPARATUS FOR DETERMINING THE ORIENTATION OF A BOREHOLE INSTRUMENT, SAID APPARATUS COMPRISING A BOWL MEMBER, SUSPENSION MEANS ROTATABLY MOUNTED WITHIN SAID INSTRUMENT AND PIVOTALLY SUPPORTING SAID BOWL MEMBER IN SUCH A MANNER THAT SAID BOWL MEMBER WILL RETAIN A VERTICAL POSITION REGARDLESS OF THE POSITION OF SAID INSTRUMENT, A RELATIVELY MASSIVE MAGNETIC COMPASS ELEMENT MOUNTED IN A FREELY ROTATABLE MANNER WITHIN SAID BOWL MEMBER, A GENERALLY CYLINDRICAL CUP HAVING A VERTICAL SLOT FORMED IN ONE SIDE THEREOF, MEANS MOUNTING SAID CUP IN AXIAL ALIGNMENT WITH SAID COMPASS ELEMENT FOR ROTATION WITH SAID COMPASS ELEMENT, A POTENTIOMETER RIGIDLY SECURED TO SAID BOWL MEMBER AND HAVING A WIPER WHICH IS ROTATABLE TO VARY THE OUTPUT OF SID POTENTIOMETER, A SHAFT FOR ROTATING SAID WIPER, A PIN SECURED TO SAID SHAFT EXTENDING PERPENDICULAR TO THE AXIS OF SAID SHAFT AND PRO-
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |