Patent US4732092A successfully refreshed from Google Patents.
US3217818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic weighing device
Assignee: Individual
•
Filing: 1964-04-06
•
Granted: 1965-11-16
•
Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Harvey J Engelsher
- 👤 Peter C Hofstra
- 👤 Robert W Mckirdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:19
CPC Classifications
G; G01; G01G; G01G5/00; G01G5/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A DEVICE FOR MEASURING WEIGHT OR PRESSURE COMPRISING A FIRST RIGID PLATFORM AND A SECOND RIGID PLATFORM EACH HAVING AT LEAST ONE PLANAR OR FLAT SURFACE FACING AND PARALLEL TO THE SAID PLANAR OR FLAT SURFACE OF THE SECOND PLATFORM, SAID FIRST PLATFORM HAVING CONVENIENTLY DISPOSED THEREUPON INFLATABLE AND DEFLATABLE AIRTIGHT MEANS, SAID AIRTIGHT MEANS HAVING A COMMONLY CONTAINED AIR CAPACITY COMMUNICABLE WITH THE ATMOSPHERE BY MEANS OF A TUBE OR DUCT HAVING AN EXTERNALLY CLOSABLE PORT IN THE WALL THEREOF, SAID TUBE OR DUCT BEING CONNECTED AT ITS OUTWARD TERMINATION TO A MEASURING DEVICE SUITABLE FOR INDICATING A PRESSURE OR WEIGHT WHEN ELECTIVELY APPLIED AGAINST THE OUTWARDLY FACING SURFACE OF EITHER THE SAID FIRST OR THE SAID SECOND PLATFORM, AND HAVING SAID SECOND PLATFORM SEPARATED FROM SAID FIRST PLATFORM BY THE INTERPOSITION OF A SECOND INFLATABLE AND DEFLATABLE AIRTIGHT MEANS, BY MEANS OF THE INFLATION OR DEFLATION OF WHICH THE INTERSURFACE DISTANCE OF THE SAID FIRST AND SECOND PLATFORMS MAY BE CONTROLLABLY ADJUSTED.
Claim 2
Independent Claim
164 words
A DEVICE FOR MEASURING WEIGHT OR PRESSURE COMPRISING A FIRST RIGID PLATFORM AND A SECOND RIGID PLATFORM EACH HAVING AT LEAST ONE PLANAR OR FLAT SURFACE FACING AND PARALLEL TO THE SAID PLANAR OR FLAT SURFACE OF THE SECOND PLATFORM, SAID FIRST PLATFORM HAVING CONVENIENTLY DISPOSED THEREUPON INFLATABLE AND DEFLATABLE AIRTIGHT MEANS, SAID AIRTIGHT MEANS HAVING A COMMONLY CONTAINED AIR CAPACITY COMMUNICABLE WITH THE ATMOSPHERE BY MEANS OF A TUBE OR DUCT HAVING AN EXTERNALLY CLOSABLE PORT IN THE WALL THEREOF, SAID TUBE OR DUCT BEING CONNECTED AT ITS OUTWARD TERMINATION TO A MEASURING DEVICE SUITABLE FOR INDICATING A PRESSURE OR WEIGHT WHEN ELECTIVELY APPLIED AGAINST THE OUTWARDLY FACING SURFACE OF EITHER THE SAID FIRST OR THE SAID SECOND PLATFORM, AND HAVING SAID SECOND PLATFORM SEPARATED FROM SAID FIRST PLATFORM BY THE INTERPOSITION OF A SECOND INFLATABLE AND DEFLATABLE AIRTIGHT MEANS, BY MEANS OF THE INFLATION OR DEFLATION OF WHICH THE INTERSURFACE DISTANCE OF THE SAID FIRST AND SECOND PLATFORMS MAY BE CONTROLLABLY ADJUSTED.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |