US2582020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic polishing
Assignee: Motors Liquidation Co
•
Filing: 1947-07-15
•
Granted: 1952-01-08
•
Expires: 1967-07-15
Abstract
No abstract record available.
Inventors
- 👤 Sheldon B Emery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:39
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; Y; Y10; Y10S; Y10S204/00; Y10S204/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A METHOD FOR UTILIZING ALTERNATING CURRENT IN ELECTROLYTIC POLISHING OPERATIONS, THE STEPS COMPRISING; PROVIDING A CATHODE TAKEN FROM THE CLASS CONSISTING OF ALUMINUM, TANTALUM AND MAGNESIUM, POSITIONING THE CATHODE IN A CELL CONTAINING A POLISHING SOLUTION CONSISTING ESSENTIALLY OF AN ELECTROLYTE TAKEN FROM THE CLASS CONSISTING OF A SATURATED AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE, A SATURATED AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE MIXED WITH A 5 TO 50% CITRIC ACID SOLUTION, AND A SATURATED AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE MIXED WITH A 5 TO 50% TARTARIC ACID SOLUTION, PROVIDING WORK TO BE POLISHED CONSISTING OF CUPREOUS METALS, AND PLACING SAID WORK IN THE CELL AS AN ANODE, AND THEN SUPPLYING ALTERNATING CURRENT TO THE CELL BY CONNECTING THE OUTPUT OF A TRANSFORMER TO SAID CATHODE AND SAID ANODE, WHEREBY THE CATODE FILMS AND PERMITS ONLY UNIPOLARITY CURRENT TO FLOW THROUGH THE ELECTROLYTE FOR POLISHING THE WORK.
Claim 2
Dependent Claim
146 words
IN A METHOD FOR UTILIZING ALTERNATING CURRENT IN ELECTROLYTIC POLISHING OPERATIONS, THE STEPS COMPRISING; PROVIDING A CATHODE TAKEN FROM THE CLASS CONSISTING OF ALUMINUM, TANTALUM AND MAGNESIUM, POSITIONING THE CATHODE IN A CELL CONTAINING A POLISHING SOLUTION CONSISTING ESSENTIALLY OF AN ELECTROLYTE TAKEN FROM THE CLASS CONSISTING OF A SATURATED AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE, A SATURATED AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE MIXED WITH A 5 TO 50% CITRIC ACID SOLUTION, AND A SATURATED AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE MIXED WITH A 5 TO 50% TARTARIC ACID SOLUTION, PROVIDING WORK TO BE POLISHED CONSISTING OF CUPREOUS METALS, AND PLACING SAID WORK IN THE CELL AS AN ANODE, AND THEN SUPPLYING ALTERNATING CURRENT TO THE CELL BY CONNECTING THE OUTPUT OF A TRANSFORMER TO SAID CATHODE AND SAID ANODE, WHEREBY THE CATODE FILMS AND PERMITS ONLY UNIPOLARITY CURRENT TO FLOW THROUGH THE ELECTROLYTE FOR POLISHING THE WORK.
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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |