Patent US3345826A successfully refreshed from Google Patents.
US3345826A
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US
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Removable casing construction
Assignee: WISCONSIN CAISSON Inc
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Filing: 1965-07-29
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Granted: 1967-10-10
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Expires: 1985-07-29
Abstract
No abstract record available.
Inventors
- 👤 Hignite Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:03
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/34; E02D5/38; E02D5/385; E02D5/66; E02D5/665
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE COMBINATION IN A STRING OF CASING OF A PLURALITY OF CASING JOINTS EACH HAVING A SKIRT AT ITS UPPER END RECEIVING THE LOWER END OF THE ADJACENT JOINT, A BAYONET CONNECTION BETWEEN ADJACENT JOINTS COMPRISING AT LEAST ONE INWARDLY EXTENDING PEG IN THE SKIRT AN AND INVERTED L-SHAPED SLOT IN THE END OF THE ADJACENT JOINT AND RECEIVING THE CORRESPONDING PEG, THE HORIZONTAL PORTIONS OF ALL OF SAID INVERTED L-SHAPED SLOTS EXTENDING IN THE SAME CIRCUMFERENTIAL DIRECTION FROM THE VERTICAL PORTION THEREOF, AND DRIVER CAP FOR MANIPULATING THE STRING OF CASING AND FOR SUCCESSIVELY ADDING JOINTS THERETO AND REMOVING JOINTS THEREFROM, SAID DRIVER CAP HAVING A SKIRT SIMULATING THE LOWER END OF A JOINT AND ADAPTED TO ENTER THE SKIRT ON THE UPPER END OF ANY JOINT AND TO REMOVABLY INTERLOCK THEREWITH BOTH ROTATIONALLY AND VERTICALLY, SAID CAP SKIRT HAVING A T-SHAPED SLOT THEREIN FOR RECEIVING EACH
Claim 2
Dependent Claim
148 words
THE COMBINATION IN A STRING OF CASING OF A PLURALITY OF CASING JOINTS EACH HAVING A SKIRT AT ITS UPPER END RECEIVING THE LOWER END OF THE ADJACENT JOINT, A BAYONET CONNECTION BETWEEN ADJACENT JOINTS COMPRISING AT LEAST ONE INWARDLY EXTENDING PEG IN THE SKIRT AN AND INVERTED L-SHAPED SLOT IN THE END OF THE ADJACENT JOINT AND RECEIVING THE CORRESPONDING PEG, THE HORIZONTAL PORTIONS OF ALL OF SAID INVERTED L-SHAPED SLOTS EXTENDING IN THE SAME CIRCUMFERENTIAL DIRECTION FROM THE VERTICAL PORTION THEREOF, AND DRIVER CAP FOR MANIPULATING THE STRING OF CASING AND FOR SUCCESSIVELY ADDING JOINTS THERETO AND REMOVING JOINTS THEREFROM, SAID DRIVER CAP HAVING A SKIRT SIMULATING THE LOWER END OF A JOINT AND ADAPTED TO ENTER THE SKIRT ON THE UPPER END OF ANY JOINT AND TO REMOVABLY INTERLOCK THEREWITH BOTH ROTATIONALLY AND VERTICALLY, SAID CAP SKIRT HAVING A T-SHAPED SLOT THEREIN FOR RECEIVING EACH
References Cited (Backward Citations)
US2693343A
Cited
FI30324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |