US2992171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for chromium plating
Assignee: GEN DEV CORP
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Filing: 1960-04-04
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Granted: 1961-07-11
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 William D Maclean
- 👤 Kenneth C Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D5/44; C25D15/00; C25D3/00; C25D3/02; C25D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF ELECTRODEPOSITING A CHROMIUM PLATE DIRECTLY ON THE SURFACE OF AN ALUMINUM ARTICLE, WITH COMPRISES IMMERSING SAID ALUMINUM ARTICLE IN A PLATING BATH COMPRISING A MIXTURE OF 15-45 OZ./GAL. CRO3, H2SO4, THE RATIO OF CRO3 TO H2SO4 BEING IN THE RANGE OF 80/1 TO 200/1, WATER, AND 3.0333-6.0 OZ/GAL. SIO2 AS PARTICLES OF SUBMICROSCOPIC DIMENSIONS CARRIED IN SUSPENSION IN SAID BATH, AND ELECTROLYZING SAID BATH TO PLATE SAID ARTICLE.
Claim 2
Independent Claim
71 words
THE METHOD OF ELECTRODEPOSITING A CHROMIUM PLATE DIRECTLY ON THE SURFACE OF AN ALUMINUM ARTICLE, WITH COMPRISES IMMERSING SAID ALUMINUM ARTICLE IN A PLATING BATH COMPRISING A MIXTURE OF 15-45 OZ./GAL. CRO3, H2SO4, THE RATIO OF CRO3 TO H2SO4 BEING IN THE RANGE OF 80/1 TO 200/1, WATER, AND 3.0333-6.0 OZ/GAL. SIO2 AS PARTICLES OF SUBMICROSCOPIC DIMENSIONS CARRIED IN SUSPENSION IN SAID BATH, AND ELECTROLYZING SAID BATH TO PLATE SAID ARTICLE.
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) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |