US3225599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manometer
Assignee: SCHWIEN ENG Inc
•
Filing: 1963-01-18
•
Granted: 1965-12-28
•
Expires: 1983-01-18
Abstract
No abstract record available.
Inventors
- 👤 Schwien Leo Nevin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
IN A MANOMETER SYSTEM INCLUDING INTERCONNECTED UPPER AND LOWER CISTERNS, ONE OF WHICH IS MOVING AND THE OTHER BEING FIXED, SAID CISTERNS CARRYING POOLS OF MERCURY, A LOWER PRESSURE SOURCE CONNECTED TO THE UPPER CISTERN ABOVE THE POOL, A HIGHER PRESSURE SOURCE CONNECTED TO THE LOWER CISTERN ABOVE THE POOL, AND MEANS FOR DRIVING THE MOVING CISTERN IN ELEVATION TO BALANCE THE SYSTEM, THE IMPROVEMENT COMPRISING: A FIXED DIVIDER PLATE IN THE LOWER CISTERN PROVIDING UPPER AND INTERMEDIATE CHAMBERS AND INCLUDING A PASSAGE INTERCONNECTING SAID UPPER AND INTERMEDIATE CHAMBERS; A FLEXIBLE DIVIDER PLATE IN THE LOWER CISTERN SEPARATING THE INTERMEDIATE CHAMBER FROM A LOWER CHAMBER, WITH THE CISTERN INTERCONNECTING LINE CONNECTED TO SAID INTERMEDIATE CHAMBER TO FILL THE INTERMEDIATE CHAMBER AND PROVIDE A POOL OF MERCURY IN THE UPPER CHAMBER, AND WITH THE HIGHER PRESSUR SOURCE CONNECTED TO SAID UPPER CHAMBER ABOVE THE POOL AND TO SAID LOWER CHAMBER; MEANS FOR CLOSING AND OPENING SAID PASSAGE; AND MEANS FOR MEASURING THE POSITION OF SAID FLEXIBLE DIVIDER PLATE RELATIVE TO THE CISTERN TO PROVIDE A SIGNAL VARYING AS A FUNCTION OF THE UNBALANCE OF THE SYSTEM.
Claim 2
Dependent Claim
185 words
IN A MANOMETER SYSTEM INCLUDING INTERCONNECTED UPPER AND LOWER CISTERNS, ONE OF WHICH IS MOVING AND THE OTHER BEING FIXED, SAID CISTERNS CARRYING POOLS OF MERCURY, A LOWER PRESSURE SOURCE CONNECTED TO THE UPPER CISTERN ABOVE THE POOL, A HIGHER PRESSURE SOURCE CONNECTED TO THE LOWER CISTERN ABOVE THE POOL, AND MEANS FOR DRIVING THE MOVING CISTERN IN ELEVATION TO BALANCE THE SYSTEM, THE IMPROVEMENT COMPRISING: A FIXED DIVIDER PLATE IN THE LOWER CISTERN PROVIDING UPPER AND INTERMEDIATE CHAMBERS AND INCLUDING A PASSAGE INTERCONNECTING SAID UPPER AND INTERMEDIATE CHAMBERS; A FLEXIBLE DIVIDER PLATE IN THE LOWER CISTERN SEPARATING THE INTERMEDIATE CHAMBER FROM A LOWER CHAMBER, WITH THE CISTERN INTERCONNECTING LINE CONNECTED TO SAID INTERMEDIATE CHAMBER TO FILL THE INTERMEDIATE CHAMBER AND PROVIDE A POOL OF MERCURY IN THE UPPER CHAMBER, AND WITH THE HIGHER PRESSUR SOURCE CONNECTED TO SAID UPPER CHAMBER ABOVE THE POOL AND TO SAID LOWER CHAMBER; MEANS FOR CLOSING AND OPENING SAID PASSAGE; AND MEANS FOR MEASURING THE POSITION OF SAID FLEXIBLE DIVIDER PLATE RELATIVE TO THE CISTERN TO PROVIDE A SIGNAL VARYING AS A FUNCTION OF THE UNBALANCE OF THE SYSTEM.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |