Patent US3299831A successfully refreshed from Google Patents.
US3299831A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1965-01-25
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Granted: 1967-01-24
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Billy R Watson
- 👤 Carl E Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:36
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A SAND SHIELD FOR USE IN A WELL COMPRISING: TUBULAR MEANS HAVING AN EXTERNAL, UPWARDLY FACING SHOULDER AND CONNECTING MEANS ON ITS UPPER END; FIRST FLEXIBLE MEANS POSITIONED ON SAID SHOULDER, ENCIRCLING SAID TUBULAR MEANS, AND EXTENDING OUTWARDLY BEYOND THE OUTER PERIPHERY OF SAID TUBULAR MEANS; SLEEVE MEANS ENCIRCLING SAID TUBULAR MEANS AND BIASING SAID FIRST FLEXIBLE MEANS AGAINST SAID SHOULDER; SECOND FLEXIBLE MEANS POSITIONED ON SAID SLEEVE MEANS, ENCIRCLING SAID TUBULAR MEANS, AND EXTENDING OUTWARDLY BEYOND THE PERIPHERY OF SAID TUBULAR MEANS; AND TUBULAR BOX MEANS CONNECTED TO SAID CONNECTING MEANS BIASING SAID SECOND FLEXIBLE MEANS AGAINST SAID SLEEVE MEANS, SAID FLEXIBLE MEANS CLOSING THE ANNULUS BETWEEN SAID TUBULAR MEANS AND THE INTERIOR SURFACE OF SAID WELL WHEN POSITIONED THEREIN.
Claim 2
Dependent Claim
121 words
A SAND SHIELD FOR USE IN A WELL COMPRISING: TUBULAR MEANS HAVING AN EXTERNAL, UPWARDLY FACING SHOULDER AND CONNECTING MEANS ON ITS UPPER END; FIRST FLEXIBLE MEANS POSITIONED ON SAID SHOULDER, ENCIRCLING SAID TUBULAR MEANS, AND EXTENDING OUTWARDLY BEYOND THE OUTER PERIPHERY OF SAID TUBULAR MEANS; SLEEVE MEANS ENCIRCLING SAID TUBULAR MEANS AND BIASING SAID FIRST FLEXIBLE MEANS AGAINST SAID SHOULDER; SECOND FLEXIBLE MEANS POSITIONED ON SAID SLEEVE MEANS, ENCIRCLING SAID TUBULAR MEANS, AND EXTENDING OUTWARDLY BEYOND THE PERIPHERY OF SAID TUBULAR MEANS; AND TUBULAR BOX MEANS CONNECTED TO SAID CONNECTING MEANS BIASING SAID SECOND FLEXIBLE MEANS AGAINST SAID SLEEVE MEANS, SAID FLEXIBLE MEANS CLOSING THE ANNULUS BETWEEN SAID TUBULAR MEANS AND THE INTERIOR SURFACE OF SAID WELL WHEN POSITIONED THEREIN.
References Cited (Backward Citations)
US1517165A
Cited
US1956694A
Cited
US2523091A
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US2493962A
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US2762439A
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US2806537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |