US2810036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indicating or controlling the level of liquids
Assignee: Aerotec Corp
•
Filing: 1955-07-11
•
Granted: 1957-10-15
•
Expires: 1975-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jacques G Mejean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:33
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A FLOAT SWITCH WHICH COMPRISES A HOUSING HAVING A BODY OF ELECTRICAL INSULATING MATERIAL IN SAID HOUSING SPACED FROM THE LOWER PART THEREOF TO FORM A FLOAT COMPARTMENT, SAID HOUSING HAVING A WALL PORTION OF POROUS METAL HAVING FINE TORTUOUS PASSAGES FOR THE RETARDED PASSAGE OF LIQUIDS AND GASEOUS MEDIA INTO AND OUT OF SAID COMPARTMENT, THE PORES OF SAID POROUS METAL BEING OF A FINENESS TO FILTER OUT PARTICLES OF A LARGEST DIMENSION NOT ABOVE ABOUT 0.005 INCH, A PAIR OF SPACED ELECTRIC TERMINALS
References Cited (Backward Citations)
US1323113A
Cited
US1253324A
Cited
US1348015A
Cited
US1744289A
Cited
US2103941A
Cited
US2278279A
Cited
US2479503A
Cited
US2613294A
Cited
US2663772A
Cited
US2661411A
Cited
US2749401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |