US3193901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making cast-in-place pipe
Assignee: American Pipe and Construction Co
•
Filing: 1961-11-20
•
Granted: 1965-07-13
•
Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Lee
- 👤 James F O'conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:11
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/024; F16L1/028; F16L1/038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
APPARATUS FOR PRODUCING CAST-IN-PLACE PIPE COMPRISING: A SKID ADAPTED TO BE MOVED LONGITUDINAL ALONG THE GROUND, AN ENVELOPE CARTRIDGE SUPPORTED FROM SAID SKID, A FOLDED BUT INFLATABLE TUBULAR ENVELOPE DISPOSED WITHIN SAID CARTRIDGE, SAID ENVELOPE HAVING A SEALED STATIONARY END EXTENDING REARWARDLY FROM SAID SKID AND A SEALED FRONT END DISPOSED WITHIN SAID CARTRIDGE, MEANS FOR INFLATING SAID TUBULAR ENVELOPE INTERMEDIATE SAID SEALED ENDS WITH SUFFICIENT PRESSURE TO SUSTAIN A LAYER OF CEMENTITIOUS MATERIAL, AND MEANS SUPPORTED FROM SAID SKID FOR PROGRESSIVELY ENCASING SAID ENVELOPE WITH MATERIAL AS SAID SKID AND CARTRIDGE ARE ADVANCED.
Claim 2
Dependent Claim
94 words
APPARATUS FOR PRODUCING CAST-IN-PLACE PIPE COMPRISING: A SKID ADAPTED TO BE MOVED LONGITUDINAL ALONG THE GROUND, AN ENVELOPE CARTRIDGE SUPPORTED FROM SAID SKID, A FOLDED BUT INFLATABLE TUBULAR ENVELOPE DISPOSED WITHIN SAID CARTRIDGE, SAID ENVELOPE HAVING A SEALED STATIONARY END EXTENDING REARWARDLY FROM SAID SKID AND A SEALED FRONT END DISPOSED WITHIN SAID CARTRIDGE, MEANS FOR INFLATING SAID TUBULAR ENVELOPE INTERMEDIATE SAID SEALED ENDS WITH SUFFICIENT PRESSURE TO SUSTAIN A LAYER OF CEMENTITIOUS MATERIAL, AND MEANS SUPPORTED FROM SAID SKID FOR PROGRESSIVELY ENCASING SAID ENVELOPE WITH MATERIAL AS SAID SKID AND CARTRIDGE ARE ADVANCED.
References Cited (Backward Citations)
US291849A
Cited
US830204A
Cited
US857584A
Cited
US857588A
Cited
US857586A
Cited
GB191213054A
Cited
US1348332A
Cited
US1636243A
Cited
GB360146A
Cited
US2125025A
Cited
US2206410A
Cited
GB570970A
Cited
US2878544A
Cited
US2950702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |