Patent US2140958A successfully refreshed from Google Patents.
Patent US3300987A successfully refreshed from Google Patents.
US3300987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for installing cardboard wick drain
Assignee: Kato Seisakusho Co Ltd
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Filing: 1964-06-22
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Granted: 1967-01-31
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Maeda Keiji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:53
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/10; E02D3/103; E02B; E02B11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
AN APPARATUS FOR DRIVING A CARDBOARD WICK IN THE CARDBOARD-DRAIN PROCESS COMPRISING A DRIVING TUBE HAVING THERETHROUGH A CARDBOARD WICK INSERTION BORE THROUGH WHICH A CARDBOARD WICK IS INSERTED, PRESSURE REDUCING MEMBERS ATTACHED TO THE INNER WALL OF SAID INSERTION BORE AND ADAPTED TO CONTACT LIGHTLY SAID CARDBOARD WICK, SAID PRESSURE REDUCING MEMBERS THEREBY FUNCTIONING TO PARTITION SAID CARDBOARD WICK INSERTION BORE INTO AN UPPER BORE AND A LOWER BORE, THE LOWER PART OF SAID LOWER BORE BEING FORMED AS A NOZZLE BY NARROWING THE SPACE BETWEEN SAID LOWER BORE WALL AND SAID CARDBOARD WICK, AND MEANS ADAPTED TO SUPPLY COMPRESSED AIR INTO SAID LOWER BORE DURING THE DRIVING OPERATION, THEREBY TO PREVENT INFILTRATION OF MUD OR WATER INTO SAID CARDBOARD WICK INSERTION BORE.
Claim 2
Independent Claim
124 words
AN APPARATUS FOR DRIVING A CARDBOARD WICK IN THE CARDBOARD-DRAIN PROCESS COMPRISING A DRIVING TUBE HAVING THERETHROUGH A CARDBOARD WICK INSERTION BORE THROUGH WHICH A CARDBOARD WICK IS INSERTED, PRESSURE REDUCING MEMBERS ATTACHED TO THE INNER WALL OF SAID INSERTION BORE AND ADAPTED TO CONTACT LIGHTLY SAID CARDBOARD WICK, SAID PRESSURE REDUCING MEMBERS THEREBY FUNCTIONING TO PARTITION SAID CARDBOARD WICK INSERTION BORE INTO AN UPPER BORE AND A LOWER BORE, THE LOWER PART OF SAID LOWER BORE BEING FORMED AS A NOZZLE BY NARROWING THE SPACE BETWEEN SAID LOWER BORE WALL AND SAID CARDBOARD WICK, AND MEANS ADAPTED TO SUPPLY COMPRESSED AIR INTO SAID LOWER BORE DURING THE DRIVING OPERATION, THEREBY TO PREVENT INFILTRATION OF MUD OR WATER INTO SAID CARDBOARD WICK INSERTION BORE.
References Cited (Backward Citations)
US2577252A
Cited
US2482673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |