Patent US3689769A successfully refreshed from Google Patents.
US3130153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of water to prevent scaling or corrosion
Assignee: Individual
•
Filing: 1959-05-13
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Granted: 1964-04-21
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Expires: 1979-05-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard F Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; C02F5/00; C02F5/08; C02F5/10; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF TREATING WATER WHICH CONTAINS DISSOLVED CARBON DIOXIDE AND AN EXCESS OF SCALING CARBONATES AND HAS A POSITIVE SATURATION INDEX; SAID METHOD COMPRISING ADDING TO THE WATER ORGANIC ACID WHICH IS WATER SOLUBLE BUT IS TO WEAK TO DISPLACE THE CARBON DIOXIDE FROM SOLUTION, MAINTAINING THE ACID AND CARBON DIOXIDE IN SOLUTION TOGETHER SO THAT THEIR ANTI-SCALING EFFECTS ARE ADDITIVE, CONTINUING TO ADD SAID WEAK ORGANIC ACID TO THE WATER, AND REGULATING THE PROPORTION OF SAID ACID WHICH IS ADDED UNTIL AN ULTIMATE CONDITION OF SUBSTANTIAL EQUILIBRIUM IS REACHED IN WHICH THE ACID AND CARBON DIOXIDE SUBSTANTIALLY COUNTERACT THE CARBONATES AND THEREBY PREVENT SCALING, AND IN WHICH SAID SATURATION INDES IS SLIGHTLY NEGATIVE, BUT NO MORE NEGATIVE THAN ABOUT -0.10, TO THEREBY ALSO PREVENT CORROSION.
Claim 2
Independent Claim
127 words
THE METHOD OF TREATING WATER WHICH CONTAINS DISSOLVED CARBON DIOXIDE AND AN EXCESS OF SCALING CARBONATES AND HAS A POSITIVE SATURATION INDEX; SAID METHOD COMPRISING ADDING TO THE WATER ORGANIC ACID WHICH IS WATER SOLUBLE BUT IS TO WEAK TO DISPLACE THE CARBON DIOXIDE FROM SOLUTION, MAINTAINING THE ACID AND CARBON DIOXIDE IN SOLUTION TOGETHER SO THAT THEIR ANTI-SCALING EFFECTS ARE ADDITIVE, CONTINUING TO ADD SAID WEAK ORGANIC ACID TO THE WATER, AND REGULATING THE PROPORTION OF SAID ACID WHICH IS ADDED UNTIL AN ULTIMATE CONDITION OF SUBSTANTIAL EQUILIBRIUM IS REACHED IN WHICH THE ACID AND CARBON DIOXIDE SUBSTANTIALLY COUNTERACT THE CARBONATES AND THEREBY PREVENT SCALING, AND IN WHICH SAID SATURATION INDES IS SLIGHTLY NEGATIVE, BUT NO MORE NEGATIVE THAN ABOUT -0.10, TO THEREBY ALSO PREVENT CORROSION.
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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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |