US3159998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum gage and leak detector
Assignee: Individual
•
Filing: 1962-03-16
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Granted: 1964-12-08
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Expires: 1982-03-16
Abstract
No abstract record available.
Inventors
- 👤 Clarke C Minter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:18
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/04; G; G01; G01M; G01M3/00; G01M3/002; G01M3/02; G01M3/26; G01M3/32; G01M3/3236; G01M3/3254
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
VACUUM GAGE AND LEAK DETECTOR COMPRISING IN COMBINATION A CONDUIT OF SUITABLE DIMENSIONS FOR CONDUCTING GASES FLOWING FROM A VESSEL BEING EVACUATED TO A VACUUM PUMP, TWO SIMILAR CURRENT-HEATED TEMPERATURE-SENSITIVE FILAMENTS MOUNTED AS CLOSE AS POSSIBLE TO BUT NOT IN THE STREAM OF GASES FLOWING THROUGH SAID CONDUIT AND FORMING ONE DIAGONAL OF A WHEATSTONE BRIDGE, TWO SIMILAR INERT RESISTANCES ON THE OTHER DIAGONAL, MEANS FOR SIMULTANEOUSLY BALANCING THE BRIDGE AND MEASURING THE ABSOLUTE PRESSURE IN THE CONDUIT, AND MEANS FOR PLUGGING A LEAK IN THE VESSEL BEING EVACUATED WHILE INTRODUCING THERETHROUGH INSTEAD OF AIR THE LOW PRESSURE VAPOR OF A LIQUID HAVING A HIGH LATENT HEAT OF VAPORIZATION.
Claim 2
Dependent Claim
109 words
VACUUM GAGE AND LEAK DETECTOR COMPRISING IN COMBINATION A CONDUIT OF SUITABLE DIMENSIONS FOR CONDUCTING GASES FLOWING FROM A VESSEL BEING EVACUATED TO A VACUUM PUMP, TWO SIMILAR CURRENT-HEATED TEMPERATURE-SENSITIVE FILAMENTS MOUNTED AS CLOSE AS POSSIBLE TO BUT NOT IN THE STREAM OF GASES FLOWING THROUGH SAID CONDUIT AND FORMING ONE DIAGONAL OF A WHEATSTONE BRIDGE, TWO SIMILAR INERT RESISTANCES ON THE OTHER DIAGONAL, MEANS FOR SIMULTANEOUSLY BALANCING THE BRIDGE AND MEASURING THE ABSOLUTE PRESSURE IN THE CONDUIT, AND MEANS FOR PLUGGING A LEAK IN THE VESSEL BEING EVACUATED WHILE INTRODUCING THERETHROUGH INSTEAD OF AIR THE LOW PRESSURE VAPOR OF A LIQUID HAVING A HIGH LATENT HEAT OF VAPORIZATION.
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) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |