US2637686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing drawn articles
Assignee: Huntington Alloys Corp
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Filing: 1949-04-02
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Granted: 1953-05-05
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Expires: 1969-04-02
Abstract
No abstract record available.
Inventors
- 👤 Robert J Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:01
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/201; C; C25; C25D; C25D5/00; C25D5/10; C25D5/12; C25D5/14; C25D5/34; C25D5/42; C25D5/44; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12722
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PROCESS FOR PRODUCING SEVERELY DRAWN ARTICLES OF COMPOSITE METAL HAVING HIGH HEAT CONDUCTIVITY AND NON-CORROSIVE PROPERTIES WHICH PROCESS CONSISTS OF CLEANING AND ETCHING A FOUNDATION LAYER SHEET OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND HIGH ALUMINUM ALLOYS AND HAVING A THICKNESS OF FROM ABOUT .020 INCH TO ABOUT .040 INCH, DIPPING SAID ETCHED SHEET IN A CONCENTRATED NITRIC ACID FOLLOWED BY RINSING IN WATER, ANODICALLY TREATING SAID DIPPED SHEET IN A 35%-50% PHOSPHORIC ACID SOLUTION AT A TEMPERATURE OF ABOUT 80* F. WITH A CURRENT DENSITY OF ABOUT 12 AMPERES PER SQUARE FOOT FOR A PERIOD OF ABOUT TEN TO FIFTEEN MINUTES, ELECTRODEPOSITING A LAYER OF NICKEL ON THE PLANE SURFACES OF SAID FOUNDATION LAYER SHEET AND CONTROLLING THE ELECTRODEPOSITION TO PRODUCE A THICKNESS OF THE NICKEL LAYER OF FROM ABOUT .003 INCH TO ABOUT .004 INCH AND WHEREIN THE THICKNESS OF THE NICKEL PLATING IS 10% TO 15% THE THICKNESS OF THE FOUNDATION LAYER WHEREBY THE TENSILE STRENGTH OF THE
Claim 2
Dependent Claim
166 words
A PROCESS FOR PRODUCING SEVERELY DRAWN ARTICLES OF COMPOSITE METAL HAVING HIGH HEAT CONDUCTIVITY AND NON-CORROSIVE PROPERTIES WHICH PROCESS CONSISTS OF CLEANING AND ETCHING A FOUNDATION LAYER SHEET OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND HIGH ALUMINUM ALLOYS AND HAVING A THICKNESS OF FROM ABOUT .020 INCH TO ABOUT .040 INCH, DIPPING SAID ETCHED SHEET IN A CONCENTRATED NITRIC ACID FOLLOWED BY RINSING IN WATER, ANODICALLY TREATING SAID DIPPED SHEET IN A 35%-50% PHOSPHORIC ACID SOLUTION AT A TEMPERATURE OF ABOUT 80* F. WITH A CURRENT DENSITY OF ABOUT 12 AMPERES PER SQUARE FOOT FOR A PERIOD OF ABOUT TEN TO FIFTEEN MINUTES, ELECTRODEPOSITING A LAYER OF NICKEL ON THE PLANE SURFACES OF SAID FOUNDATION LAYER SHEET AND CONTROLLING THE ELECTRODEPOSITION TO PRODUCE A THICKNESS OF THE NICKEL LAYER OF FROM ABOUT .003 INCH TO ABOUT .004 INCH AND WHEREIN THE THICKNESS OF THE NICKEL PLATING IS 10% TO 15% THE THICKNESS OF THE FOUNDATION LAYER WHEREBY THE TENSILE STRENGTH OF THE
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |