US3187711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic pressure indicator
Assignee: Pall Corp
•
Filing: 1963-12-19
•
Granted: 1965-06-08
•
Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Campolong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:12
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PRESSURE INDICATING DEVICE COMPRISING A HOUSING, FIRST MAGNETIC MEANS MOVABLY MOUNTED IN THE HOUSING TOWARDS AND AWAY FROM A FIRST POSITON, ANNULAR SPRING DISC BIAS MEANS URGING THE FIRST MAGNETIC MEANS IN ONE DIRECTION AND NORMALLY RETAINING THE FIRST MAGNETIC MEANS IN THE FIRST POSITION, FLUID DUCT MEANS COMMUNICATING WITH A SOURCE OF FLUID UNDER PRESSURE AND WITH ONE END OF THE FIRST MAGNETIC MEANS TO URGE IT IN THE OPPOSITE DIRECTION, SECOND MAGNETIC MEANS MOVABLE TOWARDS AND AWAY FROM THE FIRST MAGNETIC MEANS AND NORMALLY RETAINED TOWARDS THE FIRST MAGNETIC MEANS BY MAGNETIC ATTRACTION WHEN THE FIRST MAGNETIC MEANS IS IN THE FIRST POSITION, AND BIAS MEANS URGING THE SECOND MAGNETIC MEANS AWAY FROM THE FIRST
Claim 2
Dependent Claim
118 words
A PRESSURE INDICATING DEVICE COMPRISING A HOUSING, FIRST MAGNETIC MEANS MOVABLY MOUNTED IN THE HOUSING TOWARDS AND AWAY FROM A FIRST POSITON, ANNULAR SPRING DISC BIAS MEANS URGING THE FIRST MAGNETIC MEANS IN ONE DIRECTION AND NORMALLY RETAINING THE FIRST MAGNETIC MEANS IN THE FIRST POSITION, FLUID DUCT MEANS COMMUNICATING WITH A SOURCE OF FLUID UNDER PRESSURE AND WITH ONE END OF THE FIRST MAGNETIC MEANS TO URGE IT IN THE OPPOSITE DIRECTION, SECOND MAGNETIC MEANS MOVABLE TOWARDS AND AWAY FROM THE FIRST MAGNETIC MEANS AND NORMALLY RETAINED TOWARDS THE FIRST MAGNETIC MEANS BY MAGNETIC ATTRACTION WHEN THE FIRST MAGNETIC MEANS IS IN THE FIRST POSITION, AND BIAS MEANS URGING THE SECOND MAGNETIC MEANS AWAY FROM THE FIRST
References Cited (Backward Citations)
US1988345A
Cited
US2236206A
Cited
US2604316A
Cited
US2942572A
Cited
US3077854A
Cited
US3077176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |