Patent US2420940A successfully refreshed from Google Patents.
Patent US3270810A successfully refreshed from Google Patents.
US3270810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polished rod protector and blow deflector
Assignee: Individual
•
Filing: 1963-02-13
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Granted: 1966-09-06
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 Leslie A Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:26
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A POLISHED ROD PROTECTOR FOR USE WITH AN OIL WELL PUMPING SYSTEM HAVING A POLISHED ROD RECIPROCATED THROUGH A STUDDING BOX, SAID STUDDING BOX POSITIONED A DISTANCE ABOVE THE SURFACE OF THE EARTH COMPRISING: A HOLLOW BONNET MEMBER SUPPORTED TO SAID STUFFING BOX, SAID BONNET MEMBER HAVING AN OPENING IN THE TOP AND BOTTOM SURFACES THEREOF OF RECEIVE SAID POLISHED ROD, SAID BONNET MEMBER HAVING AN EXHAUST OPENING THEREIN; AND A BELLOWS MEMBER AFFIXED AT ITS LOWER END TO SAID BONNET MEMBER AT SAID UPPER OPENING IN SAID BONNET MEMBER, SAID BELLOWS MEMBER RECEIVING SAID POLISHED ROD THEREIN, SAID BELLOWS MEMBER AFFIXED AT ITS UPPER END TO SAID POLISHED ROD.
Claim 2
Dependent Claim
110 words
A POLISHED ROD PROTECTOR FOR USE WITH AN OIL WELL PUMPING SYSTEM HAVING A POLISHED ROD RECIPROCATED THROUGH A STUDDING BOX, SAID STUDDING BOX POSITIONED A DISTANCE ABOVE THE SURFACE OF THE EARTH COMPRISING: A HOLLOW BONNET MEMBER SUPPORTED TO SAID STUFFING BOX, SAID BONNET MEMBER HAVING AN OPENING IN THE TOP AND BOTTOM SURFACES THEREOF OF RECEIVE SAID POLISHED ROD, SAID BONNET MEMBER HAVING AN EXHAUST OPENING THEREIN; AND A BELLOWS MEMBER AFFIXED AT ITS LOWER END TO SAID BONNET MEMBER AT SAID UPPER OPENING IN SAID BONNET MEMBER, SAID BELLOWS MEMBER RECEIVING SAID POLISHED ROD THEREIN, SAID BELLOWS MEMBER AFFIXED AT ITS UPPER END TO SAID POLISHED ROD.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |