US3222775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding sheets of metal
Assignee: Boeing Co
•
Filing: 1960-09-12
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Granted: 1965-12-14
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Expires: 1980-09-12
Abstract
No abstract record available.
Inventors
- 👤 John B Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:14
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/3006; C; C03; C03C; C03C4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A METHOD OF BONDING SHEETS OF STEEL COMPRISING THE STEPS OF, CLEANING THE MEMBERS TO BE BONDED BY VAPOR DEGREASING WITH A CHLOROHYDROCARBON AND FURTHER CLEANING THE MEMBERS WITH AN ALKALINE CLEANER, SPRAYING A THIN WET COAT OF A CERAMIC ADHESIVE CONSISTING OF A WATER SUSPENSION OF FIRED AND GROUD BORIC ACID,SODIUM NITRATE, AND POWDERED QUARTZ FRIT ON EACH OF THE CONTACTING FACES OF THE MEMBERS TO BE BONDED, SAID BORIC ACID AND SAID SODIUM NITRATE BEING PRESENT IN AN AMOUNT SUFFICIENT TO PERMIT BONDING TO THE MEMBERS, ALLOWING THE ADHESIVE TO DRY, PLACING A SHEET OF BRAZING ALLOY FOIL COMPOSED OF SILVER, COPPER, AND LITHIUM BETWEEN THE MEMBERS TO BE BONDED AND IN CONTACT WITH THE COATS OF CERAMIC ADHESIVE, SAID BRAZING ALLOY COVERING THE ENTIRE CONTACTING FACES OF THE MEMBERS, PLACING THE MEMBERS INTO CONTACT UNDER A PRESSURE OF FROM ONE TO THREE ATMOSPHERES, AND FIRING THE STRUCTURE IN AIR AT A TEMPERATURE OF FROM 1600 TO 1800 DEGREES F. FOR A TIME OF FROM 10 TO 30 MINUTES.
Claim 2
Independent Claim
171 words
A METHOD OF BONDING SHEETS OF STEEL COMPRISING THE STEPS OF, CLEANING THE MEMBERS TO BE BONDED BY VAPOR DEGREASING WITH A CHLOROHYDROCARBON AND FURTHER CLEANING THE MEMBERS WITH AN ALKALINE CLEANER, SPRAYING A THIN WET COAT OF A CERAMIC ADHESIVE CONSISTING OF A WATER SUSPENSION OF FIRED AND GROUD BORIC ACID,SODIUM NITRATE, AND POWDERED QUARTZ FRIT ON EACH OF THE CONTACTING FACES OF THE MEMBERS TO BE BONDED, SAID BORIC ACID AND SAID SODIUM NITRATE BEING PRESENT IN AN AMOUNT SUFFICIENT TO PERMIT BONDING TO THE MEMBERS, ALLOWING THE ADHESIVE TO DRY, PLACING A SHEET OF BRAZING ALLOY FOIL COMPOSED OF SILVER, COPPER, AND LITHIUM BETWEEN THE MEMBERS TO BE BONDED AND IN CONTACT WITH THE COATS OF CERAMIC ADHESIVE, SAID BRAZING ALLOY COVERING THE ENTIRE CONTACTING FACES OF THE MEMBERS, PLACING THE MEMBERS INTO CONTACT UNDER A PRESSURE OF FROM ONE TO THREE ATMOSPHERES, AND FIRING THE STRUCTURE IN AIR AT A TEMPERATURE OF FROM 1600 TO 1800 DEGREES F. FOR A TIME OF FROM 10 TO 30 MINUTES.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |