US3141780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper coating compositions
Assignee: 3M Co
•
Filing: 1962-03-30
•
Granted: 1964-07-21
•
Expires: 1982-03-30
Abstract
No abstract record available.
Inventors
- 👤 John G Simon
- 👤 John G Songas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:54
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A COPPER COATING APPLYING BATH, EACH GALLON OF WHICH IS CAPABLE OF APPLYING A STRONGLY ANCHORED COPPER COATING TO ABOUT 40 SQUARE FEET OF FERROUS METAL SURFACE, SAID BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF ABOUT 1 TO 5% OF A STRONG INORGANIC ACID CONTAINING AN IONIZABLE COPPER SALT CAPABLE OF PLATING COPPER OUT OF SOLUTION ONTO A FERROUS METAL, AND CONTAINING FOR EACH TWO PARTS BY WEIGHT ELEMENTAL COPPER, FROM 1/3 TO 1 PART WATER-SOLUBLE POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 20,000, AND FROM ABOUT .8 TO 1.2 PARTS CONDENSATION PRODUCT OF FORMALDEHYDE AND O-TOLUIDINE.
References Cited (Backward Citations)
US2217921A
Cited
US2472393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |