US3316752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for detection and location of microleaks
Assignee: Individual
•
Filing: 1964-12-31
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Granted: 1967-05-02
•
Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 James E Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:48
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; G01M3/18; G01M3/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A METHOD OF TESTING METAL CONTAINERS TO INDICATE LEAKAGE OF THE CONTAINER''S CONTENTS WHICH CONSISTS OF THE FOLLOWING STEPS: (A) COVERING THAT PART OF SAID CONTAINER WHICH IS TO BE TESTED FOR LEAKAGE WITH AN INSULATIVE MATERIAL; (B) PERMITTING SAID INSULATIVE MATERIAL TO CURE TO FORM A HOMOGENEOUS SHEET WHICH ADHERES TO SAID CONTAINER AT ITS INTERFACE FOR CONFINING SAID CONTENTS OF SAID CONTAINER OPPOSITE A LEAK UNTIL SAID SHEET IS DEFORMED BY THE PRESSURE OF SAID CONTENTS; (C) PLACING AT LEAST ONE EASILY RUPTURED ELECTRICALLY CONDUCTIVE STRIP ON SAID INSULATIVE SHEET THEREBY FORMING AN ELECTRICAL CAPACITOR WITH SAID METAL CONTAINER SERVING AS THE FIRST PLATE THEREOF AND SAID ELECTRICALLY CONDUCTIVE STRIP SERVING AS THE SECOND PLATE THEREOF; AND (D) CONNECTING A CAPACITOR DETECTOR AND READOUT CIRCUIT BETWEEN SAID FIRST AND SECOND PLATES OF SAID CAPACITOR WHICH IS RESPONSIVE TO THE CHANGE IN THE CAPACITANCE OF SAID CAPACITOR PRODUCED WHEN SAID CONDUCTIVE STRIP IS RUPTURED BY THE DEFORMATION OF SAID SHEET CAUSED BY THE LEAKAGE OF SAID CONTAINER CONTENTS.
Claim 2
Independent Claim
169 words
A METHOD OF TESTING METAL CONTAINERS TO INDICATE LEAKAGE OF THE CONTAINER''S CONTENTS WHICH CONSISTS OF THE FOLLOWING STEPS: (A) COVERING THAT PART OF SAID CONTAINER WHICH IS TO BE TESTED FOR LEAKAGE WITH AN INSULATIVE MATERIAL; (B) PERMITTING SAID INSULATIVE MATERIAL TO CURE TO FORM A HOMOGENEOUS SHEET WHICH ADHERES TO SAID CONTAINER AT ITS INTERFACE FOR CONFINING SAID CONTENTS OF SAID CONTAINER OPPOSITE A LEAK UNTIL SAID SHEET IS DEFORMED BY THE PRESSURE OF SAID CONTENTS; (C) PLACING AT LEAST ONE EASILY RUPTURED ELECTRICALLY CONDUCTIVE STRIP ON SAID INSULATIVE SHEET THEREBY FORMING AN ELECTRICAL CAPACITOR WITH SAID METAL CONTAINER SERVING AS THE FIRST PLATE THEREOF AND SAID ELECTRICALLY CONDUCTIVE STRIP SERVING AS THE SECOND PLATE THEREOF; AND (D) CONNECTING A CAPACITOR DETECTOR AND READOUT CIRCUIT BETWEEN SAID FIRST AND SECOND PLATES OF SAID CAPACITOR WHICH IS RESPONSIVE TO THE CHANGE IN THE CAPACITANCE OF SAID CAPACITOR PRODUCED WHEN SAID CONDUCTIVE STRIP IS RUPTURED BY THE DEFORMATION OF SAID SHEET CAUSED BY THE LEAKAGE OF SAID CONTAINER CONTENTS.
References Cited (Backward Citations)
US2964587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |