Patent US2662270A successfully refreshed from Google Patents.
US2662270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of laminated structures
Assignee: Olin Industries Inc
•
Filing: 1948-01-16
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Granted: 1953-12-15
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Expires: 1968-01-16
Abstract
No abstract record available.
Inventors
- 👤 Edmund G Mitchell
- 👤 De Wilton B Timberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:08
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; C23C24/106; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0233; B23K35/0238; C23G; C23G1/00; C23G1/02; C23G1/10; C23G1/103; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE METHOD OF FORMING A COMPOSITE STRUCTURE HAVING AN EXPOSED SURFACE LAYER OF COPPERPHOSPHORUS BRAZING ALLOY WHICH COMPRISES APPLYING TO A COPPER-BASE METAL SHEET A POWDERED LAYER OF A COPPER-PHOSPHORUS BRAZING ALLOY HAVING A MELTING POINT LOWER THAN THE MELTING POINT OF THE COPPER-BASE METAL SHEET, HEATING THE SHEET AND SUPERPOSED LAYER IN A NON-OXIDIZING ATMOSPHERE AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID LAYER BUT BELOW THE MELTING POINT OF SAID SHEET FOR A LENGTH OF TIME SUFFICIENT TO CAUSE THE BRAZING ALLOY TO FORM A MOLTEN LAYER ON SAID SHEET, COOLING THE MELTING LAYER TO A TEMPERATURE BELOW THE MELTING POINT OF THE BRAZING ALLOY TO FORM A FUSION BOND BETWEEN SAID BRAZING ALLOY LAYER AND SAID SHEET, AND PICKLING THE RESULTING COMPOSITE STRUCTURE IN A BATH CONTAINING NITRIC ACID, THE CONCENTRATION OF THE NITRIC ACID IN SAID BATH AND THE DURATION OF THE PICKLING OPERATION BEING SUCH AS TO SUBSTANTIALLY INCEREASE THE DUCTILITY AND WORKABILITY OF THE BRAZING ALLOY LAYER.
Claim 2
Independent Claim
164 words
THE METHOD OF FORMING A COMPOSITE STRUCTURE HAVING AN EXPOSED SURFACE LAYER OF COPPERPHOSPHORUS BRAZING ALLOY WHICH COMPRISES APPLYING TO A COPPER-BASE METAL SHEET A POWDERED LAYER OF A COPPER-PHOSPHORUS BRAZING ALLOY HAVING A MELTING POINT LOWER THAN THE MELTING POINT OF THE COPPER-BASE METAL SHEET, HEATING THE SHEET AND SUPERPOSED LAYER IN A NON-OXIDIZING ATMOSPHERE AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID LAYER BUT BELOW THE MELTING POINT OF SAID SHEET FOR A LENGTH OF TIME SUFFICIENT TO CAUSE THE BRAZING ALLOY TO FORM A MOLTEN LAYER ON SAID SHEET, COOLING THE MELTING LAYER TO A TEMPERATURE BELOW THE MELTING POINT OF THE BRAZING ALLOY TO FORM A FUSION BOND BETWEEN SAID BRAZING ALLOY LAYER AND SAID SHEET, AND PICKLING THE RESULTING COMPOSITE STRUCTURE IN A BATH CONTAINING NITRIC ACID, THE CONCENTRATION OF THE NITRIC ACID IN SAID BATH AND THE DURATION OF THE PICKLING OPERATION BEING SUCH AS TO SUBSTANTIALLY INCEREASE THE DUCTILITY AND WORKABILITY OF THE BRAZING ALLOY LAYER.
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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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |