US2942956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum brightener compositions
Assignee: Wyandotte Chemicals Corp
•
Filing: 1958-10-13
•
Granted: 1960-06-28
•
Expires: 1978-10-13
Abstract
No abstract record available.
Inventors
- 👤 Daniel R Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/025; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A FINELY DIVIDED COMPOSITION SUITABLE FOR USE IN AQUEOUS SOLUTION AT A CONCENTRATION OF ABOUT 2.8 TO ABOUT 9.5 WEIGHT PERCENT TO BRIGHTEN ALUMINUM SURFACES WHICH CONSISTS ESSENTIALLY OF (1) ABOUT 10 TO ABOUT 25 WEIGHT PERCENT OF HYDROLYZABLE ACID FLUORIDE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL BIFLUORIDES, AMMONIUM BIFLUORIDE, SODIUM SILICOFLUORIDE AND MIXTURES THEREOF, (2) ABOUT 20 TO 50 WEIGHT PERCENT OF WATERSOLUBLE ORGANIC ACID WITH AN IONIZATION CONSTANT IN THE RANGE OF ABOUT 1X10**-4 UP TO ABOUT 2X10**-3, (3) ABOUT 15 TO ABOUT 30 WEIGHT PERCENT OF WATER-SOLUBLE METHYLCELLULOSE OF A VISCOSITY TYPE OF ABOUT 400 TTO ABOUT 4000 CENTIPOISES, AND (4) ABOUT 10 ABOUT 30 WEIGHT PERCENT OF A WATER-SOLUBLE, ACID-STABLE WETTING AGENT.
Claim 2
Dependent Claim
119 words
A FINELY DIVIDED COMPOSITION SUITABLE FOR USE IN AQUEOUS SOLUTION AT A CONCENTRATION OF ABOUT 2.8 TO ABOUT 9.5 WEIGHT PERCENT TO BRIGHTEN ALUMINUM SURFACES WHICH CONSISTS ESSENTIALLY OF (1) ABOUT 10 TO ABOUT 25 WEIGHT PERCENT OF HYDROLYZABLE ACID FLUORIDE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL BIFLUORIDES, AMMONIUM BIFLUORIDE, SODIUM SILICOFLUORIDE AND MIXTURES THEREOF, (2) ABOUT 20 TO 50 WEIGHT PERCENT OF WATERSOLUBLE ORGANIC ACID WITH AN IONIZATION CONSTANT IN THE RANGE OF ABOUT 1X10**-4 UP TO ABOUT 2X10**-3, (3) ABOUT 15 TO ABOUT 30 WEIGHT PERCENT OF WATER-SOLUBLE METHYLCELLULOSE OF A VISCOSITY TYPE OF ABOUT 400 TTO ABOUT 4000 CENTIPOISES, AND (4) ABOUT 10 ABOUT 30 WEIGHT PERCENT OF A WATER-SOLUBLE, ACID-STABLE WETTING AGENT.
References Cited (Backward Citations)
US2687346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |