Patent US3917464A successfully refreshed from Google Patents.
US3917464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless deposition of cobalt boron
Assignee: United States Department of the Army
•
Filing: 1973-07-20
•
Granted: 1975-11-04
•
Expires: 1993-07-20
Abstract
Abstract Improved electroless deposits of cobalt-boron which find particular use in protecting basis metals against corrosive attack, the deposits being prepared from an acid bath having the following preferred composition: D R A W I N G
Inventors
- 👤 Fred Pearlstein
- 👤 Robert F Weightman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:27
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/936; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12937; Y10T428/12986
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
49 words
A DOUBLE LAYER DEPOSIT ON STEEL FOR PROVIDING SYNERGISTIC PROTECTION TO SAID STEEL AGAINST CORROSIVE ATTACK IN A SALINE ENVIRONMENT, SAID DOUBLE LAYER DEPOSIT COMPRISING AN INITIAL ELECTROLESS NICKEL-PHISPHOROUS LAYER AND A COATING THEREOVER OF ELECTROLESS COBALT COMPRISING BY WIGHT, 96.0% COBALT, 1.7% BORON. 0.9% CARBON, AND 0.05% NITROGEN.
Claim 2
Dependent Claim
49 words
A DOUBLE LAYER DEPOSIT ON STEEL FOR PROVIDING SYNERGISTIC PROTECTION TO SAID STEEL AGAINST CORROSIVE ATTACK IN A SALINE ENVIRONMENT, SAID DOUBLE LAYER DEPOSIT COMPRISING AN INITIAL ELECTROLESS NICKEL-PHISPHOROUS LAYER AND A COATING THEREOVER OF ELECTROLESS COBALT COMPRISING BY WIGHT, 96.0% COBALT, 1.7% BORON. 0.9% CARBON, AND 0.05% NITROGEN.
Claim 3
Dependent Claim
31 words
DOUBLE LAYER DEPOSIT AS DESCRIBED IN CLAIM 1 FURTHER CHARACTERIZED BY SAID NICKEL-PHOSPHOROUS LAYER BEING ABOUT 7.5 MICRONS IN THICKNESS AND SAID ELECTROLESS COBALT LAYER BEING ABOUT 2.5 MICRONS IN THICKNESS.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |