US3090112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining leaks in lightning arresters and the like
Assignee: HK Porter Co Inc
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Filing: 1960-01-14
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Granted: 1963-05-21
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Expires: 1980-01-14
Abstract
No abstract record available.
Inventors
- 👤 Norman L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:18
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF TESTING FOR LEAKS A HOLLOW CONTAINER SEALED IN AN INERT GAS ATMOSPHERE CONSISTING OF THE STEPS OF, PLACING THE CONTAINER TO BE TESTED INTO A VACUUM CHAMBER HAVING A PAIR OF SPACED APART ELECTRODES, SAID CONTAINER BEING SO PLACED WITHIN THE CHAMBER THAT THE SEALED REGION OF THE CONTAINER LIES SUBSTANTIALLY BETWEEN THE SPACED ELECTRODES, CONNECTING THE ELECTRODES TO A SOURCE OF ELECTRIC POTENTIAL TO THEREBY ESTABLISH AN ELECTRIC FIELD THEREBETWEEN, AND REDUCING THE PRESSURE IN THE VACUUM CHAMBER BELOW THE PRESSURE AT WHICH THE CONTAINER WAS SEALED, WHEREBY IF A LEAK EXISTS IN THE CONTAINER SEAL THE INERT GAS WITHIN THE CONTAINER WILL FLOW OUTWARD THERETHROUGH INTO THE ELECTRIC FIELD REGION OF THE VACUUM CHAMBER AND EMIT A CHARACTERISTICALLY COLORED GLOW IN THE VISIBLE SPECTRUM.
Claim 2
Independent Claim
129 words
A METHOD OF TESTING FOR LEAKS A HOLLOW CONTAINER SEALED IN AN INERT GAS ATMOSPHERE CONSISTING OF THE STEPS OF, PLACING THE CONTAINER TO BE TESTED INTO A VACUUM CHAMBER HAVING A PAIR OF SPACED APART ELECTRODES, SAID CONTAINER BEING SO PLACED WITHIN THE CHAMBER THAT THE SEALED REGION OF THE CONTAINER LIES SUBSTANTIALLY BETWEEN THE SPACED ELECTRODES, CONNECTING THE ELECTRODES TO A SOURCE OF ELECTRIC POTENTIAL TO THEREBY ESTABLISH AN ELECTRIC FIELD THEREBETWEEN, AND REDUCING THE PRESSURE IN THE VACUUM CHAMBER BELOW THE PRESSURE AT WHICH THE CONTAINER WAS SEALED, WHEREBY IF A LEAK EXISTS IN THE CONTAINER SEAL THE INERT GAS WITHIN THE CONTAINER WILL FLOW OUTWARD THERETHROUGH INTO THE ELECTRIC FIELD REGION OF THE VACUUM CHAMBER AND EMIT A CHARACTERISTICALLY COLORED GLOW IN THE VISIBLE SPECTRUM.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |