Patent US3232186A successfully refreshed from Google Patents.
US3232186A
Expired / Lapsed
US
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Piston and rod
Assignee: DRILCO OIL TOOLS Inc
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Filing: 1964-03-16
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Granted: 1966-02-01
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Expires: 1984-03-16
Abstract
No abstract record available.
Inventors
- 👤 William R Garrett
- 👤 Henry M Bollins
- 👤 Jr Jeddy D Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:34
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F16; F16J; F16J1/00; F16J1/10; F16J1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PISTON INCLUDING A STEEL HUB HAVING AN AXIAL TAPERED OPENING THERETHROUGH AND A COATING OF MEDIUM SHEAR STRENGTH MATERIAL ON THE SURFACE OF SAID OPENING, AN INTERNALLY THREADED NUT ROTATABLY CONNECTED TO THE PISTON ADJACENT THE SMALL DIAMETER END OF SAID TAPERED OPENING, SAID NUT BEING CONNECTED TO SAID PISTON BY AN ANTIFRICATION THRUST BEARING, SAID THRUST BEARING COMPRISING
Claim 2
Dependent Claim
60 words
A PISTON INCLUDING A STEEL HUB HAVING AN AXIAL TAPERED OPENING THERETHROUGH AND A COATING OF MEDIUM SHEAR STRENGTH MATERIAL ON THE SURFACE OF SAID OPENING, AN INTERNALLY THREADED NUT ROTATABLY CONNECTED TO THE PISTON ADJACENT THE SMALL DIAMETER END OF SAID TAPERED OPENING, SAID NUT BEING CONNECTED TO SAID PISTON BY AN ANTIFRICATION THRUST BEARING, SAID THRUST BEARING COMPRISING
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |