US3089508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical solution tank and means for controlling chemical dosage
Assignee: Culligan Inc
•
Filing: 1958-10-10
•
Granted: 1963-05-14
•
Expires: 1978-10-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E Schulze
- 👤 Edmund J Heartstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:14
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/688; B; B01; B01F; B01F21/00; B01F21/20; B01F21/22; Y; Y10; Y10T; Y10T137/00; Y10T137/4891; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/8593; Y10T137/86236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A SYSTEM FOR CONTROLLING DOSAGE FROM A CHEMICAL SOLUTION TANK, COMPRISING A STORAGE TANK, AN ENCLOSURE IN SAID TANK AND COMMUNICATING WITH THE TANK, A CONDUIT EXTENDING FROM THE TOP OF THE TANK TO THE BOTTOM OF THE ENCLOSURE, A CONTROL VALVE AT THE BOTTOM OF SAID ENCLOSURE AND COMMUNICATING WITH SAID CONDUIT, A FLOAT
Claim 2
Independent Claim
55 words
A SYSTEM FOR CONTROLLING DOSAGE FROM A CHEMICAL SOLUTION TANK, COMPRISING A STORAGE TANK, AN ENCLOSURE IN SAID TANK AND COMMUNICATING WITH THE TANK, A CONDUIT EXTENDING FROM THE TOP OF THE TANK TO THE BOTTOM OF THE ENCLOSURE, A CONTROL VALVE AT THE BOTTOM OF SAID ENCLOSURE AND COMMUNICATING WITH SAID CONDUIT, A FLOAT
References Cited (Backward Citations)
US11675A
Cited
US1054533A
Cited
US1321513A
Cited
US1246394A
Cited
US1975749A
Cited
US2744868A
Cited
US2860488A
Cited
US2820419A
Cited
US2891574A
Cited
US2920644A
Cited
US2935081A
Cited
US2895810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |