US3247080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making wear-resistant surfaces
Assignee: Unisys Corp
•
Filing: 1962-05-31
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Granted: 1966-04-19
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Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 Martin A Blumenfeld
- 👤 Alessandro Ignatius A D
- 👤 George L Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/106; C; C25; C25D; C25D5/00; C25D5/02; C25D7/00; C25D7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS FOR MAKING BEARING SURFACES HAVING LOAD PRODUCING CONFIGURATIONS REQUIRING PRECISE LINE DEFINITION ON AN ALUMINUM ELEMENT INCLUDING THE STEPS OF (1) PLATING COPPER ON A PREDETERMINED SURFACE OF SAID ALUMINUM ELEMENT, (2) PLATING NICKEL ON SAID COPPER, (3) GRINDING SAID NICKEL PLATING TO THE DESIRED THICKNESS, (4) PUMICING SAID NICKEL PLATING (5) APPLYING A LIGHT-SENSITIVE PHOTO-RESIST TO SAID NICKEL PLATING, (6) EXPOSING THE PHOTO-RESIST T LIGHT THROUGH A NEGATIVE TO OBTAIN THE DESIRED PATTERN, (7) REMOVING THAT PORTION OF THE PHOTO-RESIST WHICH WAS NOT EXPOSED TO THE LIGHT, (8) APPLYING A NICKEL STRIKE TO THE NICKEL PLATE WHICH IS NOT COVERED WITH EXPOSED PHOTO-RESIST, (9) PLATING LOW STRESS RHODIUM TO A DESIRED DEPTH AND WITH PRECISE LINE DEFINITION ON THE NICKEL STRIKE WHICH IS NOT COVERED WITH EXPOSED PHOTO-RESIST, (10) REMOVING THE EXPOSED PHOTO-RESIST, (11) AND LAPPING SAID RHODIUM PLATING TO OBTAIN A UNIFORM FINISH HAVING A DESIRED DEPTH.
Claim 2
Dependent Claim
151 words
A PROCESS FOR MAKING BEARING SURFACES HAVING LOAD PRODUCING CONFIGURATIONS REQUIRING PRECISE LINE DEFINITION ON AN ALUMINUM ELEMENT INCLUDING THE STEPS OF (1) PLATING COPPER ON A PREDETERMINED SURFACE OF SAID ALUMINUM ELEMENT, (2) PLATING NICKEL ON SAID COPPER, (3) GRINDING SAID NICKEL PLATING TO THE DESIRED THICKNESS, (4) PUMICING SAID NICKEL PLATING (5) APPLYING A LIGHT-SENSITIVE PHOTO-RESIST TO SAID NICKEL PLATING, (6) EXPOSING THE PHOTO-RESIST T LIGHT THROUGH A NEGATIVE TO OBTAIN THE DESIRED PATTERN, (7) REMOVING THAT PORTION OF THE PHOTO-RESIST WHICH WAS NOT EXPOSED TO THE LIGHT, (8) APPLYING A NICKEL STRIKE TO THE NICKEL PLATE WHICH IS NOT COVERED WITH EXPOSED PHOTO-RESIST, (9) PLATING LOW STRESS RHODIUM TO A DESIRED DEPTH AND WITH PRECISE LINE DEFINITION ON THE NICKEL STRIKE WHICH IS NOT COVERED WITH EXPOSED PHOTO-RESIST, (10) REMOVING THE EXPOSED PHOTO-RESIST, (11) AND LAPPING SAID RHODIUM PLATING TO OBTAIN A UNIFORM FINISH HAVING A DESIRED DEPTH.
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |