US2631950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and composition for removing rust and scale
Assignee: Individual
•
Filing: 1949-09-27
•
Granted: 1953-03-17
•
Expires: 1969-09-27
Abstract
No abstract record available.
Inventors
- 👤 Rosenfeld Myer
- 👤 Charles F Pickett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:12
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/088
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A COMPOSITION OF MATTER FOR REMOVING IRON RUST AND SCALE FROM METAL SURFACES COMPRISING OXALIC ACID AND HYDROLYZABLE CHLORIDE OF TRIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM, THE MOLE RATIO OF OXALIC ACID TO HYDROLYZABLE CHLORIDE BEING WITHIN A RANGE NOT SUBSTANTIALLY GREATER THAN 96.5 TO 3.5 AND NOT SUBSTANTIALLY LESS THAN 83.6 TO 16.4.
Claim 2
Dependent Claim
59 words
A COMPOSITION OF MATTER FOR REMOVING IRON RUST AND SCALE FROM METAL SURFACES COMPRISING OXALIC ACID AND HYDROLYZABLE CHLORIDE OF TRIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM, THE MOLE RATIO OF OXALIC ACID TO HYDROLYZABLE CHLORIDE BEING WITHIN A RANGE NOT SUBSTANTIALLY GREATER THAN 96.5 TO 3.5 AND NOT SUBSTANTIALLY LESS THAN 83.6 TO 16.4.
Claim 3
Dependent Claim
80 words
THE PROCESS OF REMOVING IRON RUST AND SCALE FROM METALLIC SURFACES WHICH COMPRISES SUPPLYING THERETO A SOLUTION CONTAINING OXALIC ACID AND A HYDROLYZABLE CHLORIDE OF A TRIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM, THE MOLE RATIO OF OXALIC ACID TO HYDROLYZABLE CHLORIDE BEING WITHIN A RANGE NOT SUBSTANTIALLY GREATER THAN 96.5 AND 3.5 AND NOT SUBSTANTIALLY LESS THAN 83.6 TO 16.4, AND MAINTAINING A PROLONGED CONTACT BETWEEN SAID SOLUTION AND SAID SURFACES AT AN ELEVATED TEMPERATURE.
Claim 4
Dependent Claim
80 words
THE PROCESS OF REMOVING IRON RUST AND SCALE FROM METALLIC SURFACES WHICH COMPRISES SUPPLYING THERETO A SOLUTION CONTAINING OXALIC ACID AND A HYDROLYZABLE CHLORIDE OF A TRIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM, THE MOLE RATIO OF OXALIC ACID TO HYDROLYZABLE CHLORIDE BEING WITHIN A RANGE NOT SUBSTANTIALLY GREATER THAN 96.5 AND 3.5 AND NOT SUBSTANTIALLY LESS THAN 83.6 TO 16.4, AND MAINTAINING A PROLONGED CONTACT BETWEEN SAID SOLUTION AND SAID SURFACES AT AN ELEVATED TEMPERATURE.
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) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |