Patent US3262305A successfully refreshed from Google Patents.
US3262305A
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Method and apparatus for calibrating differential pressure cells
Assignee: Individual
•
Filing: 1964-03-11
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Granted: 1966-07-26
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Expires: 1984-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jack S Dawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:35
CPC Classifications
G; G01; G01L; G01L27/00; G01L27/002; G01L27/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A METHOD OF CALIBRATING A DIFFERENTIAL PRESSURE CELL HAVING HIGH AND LOW PRESSURE SIDES COMPRISING: PROVIDING SEPARATE ENCLOSED WATER HEADS ONE OF THE HIGH SIDE OF THE CELL AND THE OTHER ON THE LOW SIDE, SUCCESSIVELY APPLYING GASEOUS FLUID PRESSURE TO ONE OF SAID ENCLOSED HEADS AND THEN TO THE OTHER, CONCURRENTLY WITH SAID SUCCESSIVE PRESSURE APPLICATIONS SUCCESSIVELY VENTING ONE SIDE OF THE CELL AND THEN THE OTHER FOR INSURING SOLID AIR-FREE WATER HEADS, THEN EQUALIZING WATER PRESSURE ON BOTH SIDES OF THE CELL, APPLYING A CONTROLLED AND GAUGED GASOUS FLIUD PRESSURE TO THE ENCLOSED WATER HEAD OF SAID HIGH SIDE OF THE CELL WHILE VENTING THE ENCLOSED WATER HEAD OF SAID LOW SIDE, VARYING SAID APPLIED GAUGED PRESSURE, AND ADJUSTING THE DIFFERENTIAL PRESSURE RESPONSE OF THE CELL TO SAID VARIED PRESSURE IN CONFORMITY WITH SAID GAUGED PRESSURE.
References Cited (Backward Citations)
US2337171A
Cited
US3077102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |