US3287148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for sealing gas mains
Assignee: West Chester Chemical Co Inc
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Filing: 1963-03-01
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Granted: 1966-11-22
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward O Hilbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:12
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/164; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0441; Y10T137/0452
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF SEALING LEAKS IN CONDUITS FOR GAS WITHOUT REMOVING SAME FROM SERVICE WHICH COMPRISES THE STEPS OF FOAMING A LIQUID SEALANT COMPATIBLE WITH THE GAS PASSING THROUGH SAID CONDUIT AND CAPABLE OF BEING CONDENSED TO FORM A SEALING FILM, INTRODUCING SAID FOAMED SEALANT TO THE BORE OF A CONDUIT WITHOUT REMOVING SAID CONDUIT FROM SERVICE, AND DIRECTING THE FOAMED SEALANT IN THE DIRECTION OF FLOW OF THE GAS IN SAID CONDUIT TO AN AREA PF LEAKAGE IN THE CONDUIT WHEREBY THE FOAMED SEALANT
Claim 2
Independent Claim
85 words
THE METHOD OF SEALING LEAKS IN CONDUITS FOR GAS WITHOUT REMOVING SAME FROM SERVICE WHICH COMPRISES THE STEPS OF FOAMING A LIQUID SEALANT COMPATIBLE WITH THE GAS PASSING THROUGH SAID CONDUIT AND CAPABLE OF BEING CONDENSED TO FORM A SEALING FILM, INTRODUCING SAID FOAMED SEALANT TO THE BORE OF A CONDUIT WITHOUT REMOVING SAID CONDUIT FROM SERVICE, AND DIRECTING THE FOAMED SEALANT IN THE DIRECTION OF FLOW OF THE GAS IN SAID CONDUIT TO AN AREA PF LEAKAGE IN THE CONDUIT WHEREBY THE FOAMED SEALANT
References Cited (Backward Citations)
US2950702A
Cited
US3108012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |