US2855348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium plating
Assignee: Tiarco Corp
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Filing: 1955-08-25
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Granted: 1958-10-07
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Expires: 1975-08-25
Abstract
No abstract record available.
Inventors
- 👤 Paul J Topelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:42
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF CHROMIUM PLATING A METAL OBJECT SE-LECTED FROM THE GROUP CONSISTING OF ZINC AND LEAD COMPRISING TREATING THE OBJECT WITH A SOLUTION CONSISTINGG ESSENTIALLY OF CHROMIC ACID, PHOSPHORIC ACID AND HYDROCHLORIC ACID IN THE PROPORTIONS OF APPROXIMATELY 36 TO 44 OUNCES OF CHROMIC ACID, 800 TO 1200CC. OF 85% ORTHOPHOSPHORIC ACID AND 700 TO 1100CC. OF CONCENTRATEDD HYDROCHLORIC ACID, RINSING, PLACING THE OBJECT IN A CHROMIUM ELECTROPLATING BATH, AND ELECTROPLATING WITH CHROMIUM.
Claim 2
Independent Claim
74 words
A METHOD OF CHROMIUM PLATING A METAL OBJECT SE-LECTED FROM THE GROUP CONSISTING OF ZINC AND LEAD COMPRISING TREATING THE OBJECT WITH A SOLUTION CONSISTINGG ESSENTIALLY OF CHROMIC ACID, PHOSPHORIC ACID AND HYDROCHLORIC ACID IN THE PROPORTIONS OF APPROXIMATELY 36 TO 44 OUNCES OF CHROMIC ACID, 800 TO 1200CC. OF 85% ORTHOPHOSPHORIC ACID AND 700 TO 1100CC. OF CONCENTRATEDD HYDROCHLORIC ACID, RINSING, PLACING THE OBJECT IN A CHROMIUM ELECTROPLATING BATH, AND ELECTROPLATING WITH CHROMIUM.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |