Patent US3110102A successfully refreshed from Google Patents.
US3110102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fusion joining employing stop-off material
Assignee: North American Aviation Corp
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Filing: 1958-10-31
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Granted: 1963-11-12
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Expires: 1978-10-31
Abstract
No abstract record available.
Inventors
- 👤 Otto T Pfefferkorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:13
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD OF FUSION JOINING A PLURALITY OF MEMBERS COMPRISING APPLYING A THIN COATING OF A BRAZING STOPOFF COMPOSITION TO THE SURFACE OF SUCH MEMBERS TO DEFINE UNCOATED AREAS IN THE VICINITY OF THE DESIRED JOINT, SAID COMPOSITION HAVING A SURFACE PROTECTING SOLIDS CONTENT CONSISTING ESSENTIALLY OF FROM ABOUT 1 TO ABOUT 20 PARTS OF LEVIGATED ALUMINA AND 1 PART OF AT LEAST ONE OXIDE OF THE GROUP CONSISTING OF THE OXIDES OF SI, TI, GE, ZR, SN, CE, HF, PB, AND TH, APPLYING FILLER METAL TO SAID MEMBERS OF SAID UNCOATED AREAS, MAINTAINING SAID MEMBERS AND SAID FILLER METAL AT A TEMPERATURE SUFFICIENT TO FORM A BOND BETWEEN SAID MEMBERS, AND COOLING SAID BONDED MEMBERS TO SOLIDIFY SAID FILLER METAL AND FORM A PERMANENT BOND.
Claim 2
Independent Claim
126 words
A METHOD OF FUSION JOINING A PLURALITY OF MEMBERS COMPRISING APPLYING A THIN COATING OF A BRAZING STOPOFF COMPOSITION TO THE SURFACE OF SUCH MEMBERS TO DEFINE UNCOATED AREAS IN THE VICINITY OF THE DESIRED JOINT, SAID COMPOSITION HAVING A SURFACE PROTECTING SOLIDS CONTENT CONSISTING ESSENTIALLY OF FROM ABOUT 1 TO ABOUT 20 PARTS OF LEVIGATED ALUMINA AND 1 PART OF AT LEAST ONE OXIDE OF THE GROUP CONSISTING OF THE OXIDES OF SI, TI, GE, ZR, SN, CE, HF, PB, AND TH, APPLYING FILLER METAL TO SAID MEMBERS OF SAID UNCOATED AREAS, MAINTAINING SAID MEMBERS AND SAID FILLER METAL AT A TEMPERATURE SUFFICIENT TO FORM A BOND BETWEEN SAID MEMBERS, AND COOLING SAID BONDED MEMBERS TO SOLIDIFY SAID FILLER METAL AND FORM A PERMANENT BOND.
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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) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |