US3025876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water fluoridation device
Assignee: Individual
•
Filing: 1959-10-02
•
Granted: 1962-03-20
•
Expires: 1979-10-02
Abstract
No abstract record available.
Inventors
- 👤 Robert W Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:39
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/766; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/8597
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A FLUID PROPORTIONING DEVICE FOR INTRODUCING A SECONDARY FLUID IN A SUBSTANTIALLY CONSTANT PROPROTION INTO A PRIMARY FLUID COMPRISING A HOLLOW CASING INTERPOSED IN THE FLUID FLOW LINE OF THE PRIMARY FLUID, A TRANSVERSELY EXTENDING POROUS MEMBER DIVIDING THE CASING INTO TWO COMPARTMENTS WITH THE UPSTREAM COMPARTMENT HAVING A HIGHER PRESSURE THAN THE DOWNSTREAM COMPARTMENT THEREBY PROVIDING A PRESSURE DIFFERENTIAL ON OPPOSITE SIDES OF THE POROUS MEMBER, A HOLLOW TANK DISPOSED IN SPACED RELATION TO SAID CASING, SAID HOLLOW TANK INCLUDING A FLEXIBLE NON-STRETCHABLE DIAPHRAGM, THE PORTION OF THE TANK OUTWARDLY OF TEH DIAPHAGM ADAPTED TO CONTAIN SECONDARY
Claim 2
Dependent Claim
98 words
A FLUID PROPORTIONING DEVICE FOR INTRODUCING A SECONDARY FLUID IN A SUBSTANTIALLY CONSTANT PROPROTION INTO A PRIMARY FLUID COMPRISING A HOLLOW CASING INTERPOSED IN THE FLUID FLOW LINE OF THE PRIMARY FLUID, A TRANSVERSELY EXTENDING POROUS MEMBER DIVIDING THE CASING INTO TWO COMPARTMENTS WITH THE UPSTREAM COMPARTMENT HAVING A HIGHER PRESSURE THAN THE DOWNSTREAM COMPARTMENT THEREBY PROVIDING A PRESSURE DIFFERENTIAL ON OPPOSITE SIDES OF THE POROUS MEMBER, A HOLLOW TANK DISPOSED IN SPACED RELATION TO SAID CASING, SAID HOLLOW TANK INCLUDING A FLEXIBLE NON-STRETCHABLE DIAPHRAGM, THE PORTION OF THE TANK OUTWARDLY OF TEH DIAPHAGM ADAPTED TO CONTAIN SECONDARY
References Cited (Backward Citations)
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Cited
US1883720A
Cited
US1947586A
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US2310051A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |