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Patent US3326035A successfully refreshed from Google Patents.
US3326035A
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Method for detecting leaks in process equipment
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1965-06-25
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Granted: 1967-06-20
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Hirota Nobuyoshi
- 👤 Onoshima Yoshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:22
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/12; G01M3/14; G01M3/146; F; F16; F16L; F16L2101/00; F16L2101/30; Y; Y10; Y10S; Y10S252/00; Y10S252/964
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD FOR DETECTING LEAKAGES INEQUIPMENT, WHICH COMPRISES LOCALLY APPLYING AN AQUEOUS SOLUTION OF A SUBSTANCE, CAPABLE OF FORMING A CONTINUOUS MICROCRYSTALLINE FILM ON EVAPORATION OF WATER, ALLOWING THE WATER TO EVAPORATE AND DEPOSIT A MICROCRYSTALLINE CONTINUOUS FILM OF SAID SUBSTANCE, EXTERNALLY APPLYING AS AN INDICATOR A SURFACE-ACTIVE AGENT WHICH IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF SOAP, ANIONIC AND NONIONIC SURFACE-ACTIVE-AGENTS, WHEREBY A STABLE FOAM IS PRODUCED FROM SAID SURFACE-ACTIVE AGENT UPON SAID MICROCRYSTALLINE FILM, WHICH LASTS FOR AT LEAST 30 MINUTES AND SIMULTANEOUSLY INTRODUCING A GAS WITHIN SAID EQUIPMENT, WHEREBY SAID GAS ESCAPES FROM SAID EQUIPMENT AT THE POINTS OF LEAKAGE IN A CONTINUOUS FINELY DISPERSED FORM.
Claim 2
Independent Claim
111 words
A METHOD FOR DETECTING LEAKAGES INEQUIPMENT, WHICH COMPRISES LOCALLY APPLYING AN AQUEOUS SOLUTION OF A SUBSTANCE, CAPABLE OF FORMING A CONTINUOUS MICROCRYSTALLINE FILM ON EVAPORATION OF WATER, ALLOWING THE WATER TO EVAPORATE AND DEPOSIT A MICROCRYSTALLINE CONTINUOUS FILM OF SAID SUBSTANCE, EXTERNALLY APPLYING AS AN INDICATOR A SURFACE-ACTIVE AGENT WHICH IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF SOAP, ANIONIC AND NONIONIC SURFACE-ACTIVE-AGENTS, WHEREBY A STABLE FOAM IS PRODUCED FROM SAID SURFACE-ACTIVE AGENT UPON SAID MICROCRYSTALLINE FILM, WHICH LASTS FOR AT LEAST 30 MINUTES AND SIMULTANEOUSLY INTRODUCING A GAS WITHIN SAID EQUIPMENT, WHEREBY SAID GAS ESCAPES FROM SAID EQUIPMENT AT THE POINTS OF LEAKAGE IN A CONTINUOUS FINELY DISPERSED FORM.
References Cited (Backward Citations)
US2665257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |