US2989448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brass, copper-tin, and copper plating bath brightener
Assignee: Individual
•
Filing: 1959-04-08
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Granted: 1961-06-20
•
Expires: 1979-04-08
Abstract
No abstract record available.
Inventors
- 👤 Daniel R France
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:50
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/58; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A BRIGHTENER FOR PLATING A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, COPPER-TIN AND BRASS COMPRISING THE FOLLOWING IN THE FOLLOWING PROPORTIONS, SIXTEEN OUNCES SODIUM HYDROXIDE, SIX OUNCES ARSENIC TRIOXIDE, SIX TENTHS OUNCE LEAD SUBACETATE, THREE OUNCES SODIUM STANNATE, TWO TENTHS OUNCE VANADIUM PENTOXIDE, ONE AND SIX TENTHS OUNCES ETHYLENEDIAMINETETRA ACETIC ACID TETRASODIUM SALT, THREE AND TWO TENTHS OUNCE ALKYL-ARYL AMINE TYPE WETTING AGENT AND WATER SUFFICIENT TO MAKE ONE GALLON OF BRIGHTENER.
Claim 2
Dependent Claim
74 words
A BRIGHTENER FOR PLATING A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, COPPER-TIN AND BRASS COMPRISING THE FOLLOWING IN THE FOLLOWING PROPORTIONS, SIXTEEN OUNCES SODIUM HYDROXIDE, SIX OUNCES ARSENIC TRIOXIDE, SIX TENTHS OUNCE LEAD SUBACETATE, THREE OUNCES SODIUM STANNATE, TWO TENTHS OUNCE VANADIUM PENTOXIDE, ONE AND SIX TENTHS OUNCES ETHYLENEDIAMINETETRA ACETIC ACID TETRASODIUM SALT, THREE AND TWO TENTHS OUNCE ALKYL-ARYL AMINE TYPE WETTING AGENT AND WATER SUFFICIENT TO MAKE ONE GALLON OF BRIGHTENER.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |