Patent US3254797A successfully refreshed from Google Patents.
US3254797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical dispenser
Assignee: Individual
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Filing: 1965-03-04
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Granted: 1966-06-07
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Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 Charles R Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:44
CPC Classifications
E; E03; E03D; E03D9/00; E03D9/02; E03D9/03; E03D9/033; E03D9/037
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
APPARATUS FOR DISPENSING A LIQUID INTO A FLUID FLOW SYSTEM HAVING A WATER SUPPLY TANK INTO WHICH WATER IS ADMITTED TO REPLENISH THE WATER IN THE TANK AND FROM WHICH THE WASTER IS ALLOWED TO FLOW DURING OPERATION OF THE SYSTEM, COMPRISING A CONTAINER FOR A LIQUID TO BE DISPENSED, A HOLLOW HOUSING IN THE CONTAINER FORMED WITH A DIAPHRAGM CHAMBER, A FLEXIBLE DIAPHRAGM IN THE HOUSING DIVIDING THE CHAMBER, MEANS FOR ADMITTING LIQUID FROM THE CONTAINER INTO SAID CHAMBER ON ONE SIDE OF THE DIAPHRAGM UPON FLEXING OF THE DIAPHRAGM IN ONE DIRECTION AND FOR ALLOWING AN OUTFLOW OF THE LIQUID THEREFROM INTO THE TANK UPON FLEXING OF THE DIAPHRAGM IN THE OTHER DIRECTION AND MEANS FOR FLEXING THE DIAPHRAGM IN SAID ONE
Claim 2
Dependent Claim
124 words
APPARATUS FOR DISPENSING A LIQUID INTO A FLUID FLOW SYSTEM HAVING A WATER SUPPLY TANK INTO WHICH WATER IS ADMITTED TO REPLENISH THE WATER IN THE TANK AND FROM WHICH THE WASTER IS ALLOWED TO FLOW DURING OPERATION OF THE SYSTEM, COMPRISING A CONTAINER FOR A LIQUID TO BE DISPENSED, A HOLLOW HOUSING IN THE CONTAINER FORMED WITH A DIAPHRAGM CHAMBER, A FLEXIBLE DIAPHRAGM IN THE HOUSING DIVIDING THE CHAMBER, MEANS FOR ADMITTING LIQUID FROM THE CONTAINER INTO SAID CHAMBER ON ONE SIDE OF THE DIAPHRAGM UPON FLEXING OF THE DIAPHRAGM IN ONE DIRECTION AND FOR ALLOWING AN OUTFLOW OF THE LIQUID THEREFROM INTO THE TANK UPON FLEXING OF THE DIAPHRAGM IN THE OTHER DIRECTION AND MEANS FOR FLEXING THE DIAPHRAGM IN SAID ONE
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |