Patent US3227572A successfully refreshed from Google Patents.
US3227572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe repair process
Assignee: Chevron USA Inc
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Filing: 1962-06-06
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Granted: 1966-01-04
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Expires: 1982-06-06
Abstract
No abstract record available.
Inventors
- 👤 Victor A Rundle
- 👤 Carl E Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:09
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/164
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
PROCESS FOR REDUCING THE LEAKAGE IN BURIED WATERCARRYING CERAMIC AND CONCRETE PIPE, WHICH COMPRISES INTRODUCING INTO WATER CONTAINED IN SAID PIPE AN AQUEOUS WAX DISPERSION HAVING PARTICLE SIZES OF NO GREATER THAN 5 MICRONS, WHERBY SAID WAX DISPERSION ESCAPES THROUGH THE OPENINGS IN SAIDPIPE INTO THE SURROUNDING SOIL AND COLLAPSES IN SAID SOIL TO FORM A SEAL AGAINST FURTHER LEAKAGE.
Claim 2
Dependent Claim
60 words
PROCESS FOR REDUCING THE LEAKAGE IN BURIED WATERCARRYING CERAMIC AND CONCRETE PIPE, WHICH COMPRISES INTRODUCING INTO WATER CONTAINED IN SAID PIPE AN AQUEOUS WAX DISPERSION HAVING PARTICLE SIZES OF NO GREATER THAN 5 MICRONS, WHERBY SAID WAX DISPERSION ESCAPES THROUGH THE OPENINGS IN SAIDPIPE INTO THE SURROUNDING SOIL AND COLLAPSES IN SAID SOIL TO FORM A SEAL AGAINST FURTHER LEAKAGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |