US3157585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium plating
Assignee: Motors Liquidation Co
•
Filing: 1959-12-18
•
Granted: 1964-11-17
•
Expires: 1979-12-18
Abstract
No abstract record available.
Inventors
- 👤 Rollie P Durham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:35
CPC Classifications
C; C25; C25F; C25F1/00; C25D; C25D3/00; C25D3/02; C25D3/04; C25D5/00; C25D5/10; C25D5/12; C25D5/14; C25D5/60; C25D5/625; C25D5/627; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854; Y10T428/12861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A METHOD OF FORMING A MULTI-LAYER DECORATIVE CHROMIUM COATING WHICH COMPRISES ELECTRODEPOSITING A NICKEL COATING ONTO THE SURFACE OF A METAL PART, ELECTRODEPOSITING A FIRST BRIGHT DECORATIVE CHROMIUM LAYER ONTO THE SURFACE OF SAID PART UNDER AN AVERAGE CATHODE CURRENT DENSITY OF APPROXIMATELY 90 AMPERES PER SQUARE FOOT TO 140 AMPERES PER SQUARE FOOT FROM A BATH AT A TEMPERATURE OF APPROXIMATELY 95*F. TO 115*F. CONTAINING APPROXIMATELY 20 OUNCES PER GALLON TO 35 OUNCES PER GALLON CRO3 AND ABOUT .20 OUNCE PER GALLON (AVDP.) TO .35 OUNCE PER GALLON (AVDP.) H2SO4, AND THEN, WITHOUT INTERVENING ABRASIVE TREATMENT OF SAID CHROMIUM PLATED SURFACE AND UNDER AN AVERAGE CATHODE CURRENT DENSITY OF APPROXIMATELY 130 AMPERES PER SQUARE FOOT TO 300 AMPERES PER SQUARE FOOT, ELECTRODEPOSITING ONTO SAID FIRST LAYER A SECOND DECORATIVE CHROMIUM LAYER WHICH HAS A DENSER CRACK PATTERN THAN SAID FIRST LAYER USING A BATH AT A TEMPERATURE OF APPROXIMATELY 120*F. TO 150*F. CONTAINING ABOUT 40 OUNCES PER GALLON TO 70 OUNCES PER GALLON CRO3 AND .45 OUNCE PER GALLON (AVDP.) TO .70 OUNCE PER GALLON (AVDP.) H2SO4.
Claim 2
Independent Claim
178 words
A METHOD OF FORMING A MULTI-LAYER DECORATIVE CHROMIUM COATING WHICH COMPRISES ELECTRODEPOSITING A NICKEL COATING ONTO THE SURFACE OF A METAL PART, ELECTRODEPOSITING A FIRST BRIGHT DECORATIVE CHROMIUM LAYER ONTO THE SURFACE OF SAID PART UNDER AN AVERAGE CATHODE CURRENT DENSITY OF APPROXIMATELY 90 AMPERES PER SQUARE FOOT TO 140 AMPERES PER SQUARE FOOT FROM A BATH AT A TEMPERATURE OF APPROXIMATELY 95*F. TO 115*F. CONTAINING APPROXIMATELY 20 OUNCES PER GALLON TO 35 OUNCES PER GALLON CRO3 AND ABOUT .20 OUNCE PER GALLON (AVDP.) TO .35 OUNCE PER GALLON (AVDP.) H2SO4, AND THEN, WITHOUT INTERVENING ABRASIVE TREATMENT OF SAID CHROMIUM PLATED SURFACE AND UNDER AN AVERAGE CATHODE CURRENT DENSITY OF APPROXIMATELY 130 AMPERES PER SQUARE FOOT TO 300 AMPERES PER SQUARE FOOT, ELECTRODEPOSITING ONTO SAID FIRST LAYER A SECOND DECORATIVE CHROMIUM LAYER WHICH HAS A DENSER CRACK PATTERN THAN SAID FIRST LAYER USING A BATH AT A TEMPERATURE OF APPROXIMATELY 120*F. TO 150*F. CONTAINING ABOUT 40 OUNCES PER GALLON TO 70 OUNCES PER GALLON CRO3 AND .45 OUNCE PER GALLON (AVDP.) TO .70 OUNCE PER GALLON (AVDP.) H2SO4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |