US2961292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for inhibiting acid cleaned cooling systems
Assignee: Individual
•
Filing: 1959-03-24
•
Granted: 1960-11-22
•
Expires: 1979-03-24
Abstract
No abstract record available.
Inventors
- 👤 Charles F Pickett
- 👤 Rosenfeld Myer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE PROCESS OF INHIBITING CORROSION IN AN ACID CLEANED COOLING SYSTEM COMPRISING THE STEPS OF CIRCULATING THROUGH SAID SYSTEM A SODIUM SILICATE SOLUTION OF A CONCENTRATION BETWEEN APPROXIMATELY 0.18 TO 1.6% BY WEIGHT, DRAINING SAID SOLUTION, ADDING A COOLING MEDIUM TO SAID SYSTEM AND ADDING SODIUM TETRABORATE AND HEXAMETHYLENE TETRAMINE IN SUCH QUANTITY AS TO CORRESPOND TO APPROXIMATELY 0.6 TO 2 GRAMS ANHYDROUS CONTENT OF SODIUM TETRABORATE AND APPROXIMATELY 0.04 TO 0.8 GRAM OF HEXAMETHYLENE TETRAMINE PER 100 MILLILITERS OF COOLING MEDIUM TO SAID COOLING MEDIUM.
Claim 2
Dependent Claim
86 words
THE PROCESS OF INHIBITING CORROSION IN AN ACID CLEANED COOLING SYSTEM COMPRISING THE STEPS OF CIRCULATING THROUGH SAID SYSTEM A SODIUM SILICATE SOLUTION OF A CONCENTRATION BETWEEN APPROXIMATELY 0.18 TO 1.6% BY WEIGHT, DRAINING SAID SOLUTION, ADDING A COOLING MEDIUM TO SAID SYSTEM AND ADDING SODIUM TETRABORATE AND HEXAMETHYLENE TETRAMINE IN SUCH QUANTITY AS TO CORRESPOND TO APPROXIMATELY 0.6 TO 2 GRAMS ANHYDROUS CONTENT OF SODIUM TETRABORATE AND APPROXIMATELY 0.04 TO 0.8 GRAM OF HEXAMETHYLENE TETRAMINE PER 100 MILLILITERS OF COOLING MEDIUM TO SAID COOLING MEDIUM.
References Cited (Backward Citations)
US2060138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |