US3067070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning method for industrial systems
Assignee: Individual
•
Filing: 1961-02-01
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Granted: 1962-12-04
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Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Charles M Loucks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
C; C23; C23G; C23G1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
A PROCESS OF CLEANING AN INDUSTRIAL SYSTEM SUBJECT TO ACCUMULATIONS OF WATER-INSOLUBLE DEPOSITS ON THE METAL SURFACES THEREOF COMPRISING THE STEPS OF EXPOSING THE DEPOSITS TO AN INORGANIC ACID SOLUTION BY FILLING THE SYSTEM WITH SAID ACID SOLUTION, RETAINING SAID ACID SOLUTION IN THE SYSTEM UNTIL THE DEPOSITS ARE DISSOLVED, DRAINING THE BULK OF THE SPENT ACID SOLUTION FROM THE SYSTEM IMMEDIATELY THEREAFTER REFILLING THE SYSTEM WITH AN ALKALINE SOLUTION TO NEUTRALIZE THE METAL SURFACES AND ANY ACID SOLUTION REMAINING THEREIN, SAID ALKALINE SOLUTION CONTAINING A SEQUESTERING AGENT FOR FORMING ALKALI SOLUBLE COMPLEXES WITH THE METAL IONS OF THE DISSOLVED DEPOSITS, AND FINALLY DRAINING THE ALKALINE SOLUTION FROM THE SYSTEM.
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |