US3427706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandwich structures and method
Assignee: Douglas Aircraft Co Inc
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Filing: 1964-11-13
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Granted: 1969-02-18
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Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Robert I Jaffee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:13
CPC Classifications
B; B21; B21D; B21D47/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T428/00; Y10T428/12; Y10T428/12292; Y10T428/1234; Y10T428/12347; Y10T428/12375; Y10T428/1241; Y10T428/12493; Y10T428/12771; Y10T428/12778; Y10T428/12806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF AUTOGENOUS WELDING COMPRISING THE STEPS OF: ASSEMBLING A CONFIGURATION OF PARTS WITH SURFACE PORTIONS TO BE JOINED IN ABUTTING RELATIONSHIP IN A YOKE; FILLING THE YOKE AROUND SAID CONFIGURATION OF PARTS WITH A SPACER MATERIAL OF CHEMICALLY LEACHABLE CHARACTERISTICS; COVERING SAID YOKE TO SEAL SAID PARTS THEREIN; HEATING AND ROLLING THE RESULTING ASSEMBLY BY APPLICATION OF A FORCE IN A DIRECTION OTHER THAN NORMAL TO THE PLANE OF AT LEAST ONE PAIR OF SAID ABUTTING SURFACE PORTIONS TO EFFECT AN AUTOGENOUS WELD BETWEEN SAID ABUTTING SURFACE PORTIONS OF SAID PARTS AND THE THICKNESS OF SAID YOKE HAS BEEN REDUCED TO A SELECTED THICKNESS; AND CHEMICALLY LEACHING SAID SPACER MATERIAL FROM AROUND SAID PARTS.
Claim 2
Independent Claim
116 words
THE METHOD OF AUTOGENOUS WELDING COMPRISING THE STEPS OF: ASSEMBLING A CONFIGURATION OF PARTS WITH SURFACE PORTIONS TO BE JOINED IN ABUTTING RELATIONSHIP IN A YOKE; FILLING THE YOKE AROUND SAID CONFIGURATION OF PARTS WITH A SPACER MATERIAL OF CHEMICALLY LEACHABLE CHARACTERISTICS; COVERING SAID YOKE TO SEAL SAID PARTS THEREIN; HEATING AND ROLLING THE RESULTING ASSEMBLY BY APPLICATION OF A FORCE IN A DIRECTION OTHER THAN NORMAL TO THE PLANE OF AT LEAST ONE PAIR OF SAID ABUTTING SURFACE PORTIONS TO EFFECT AN AUTOGENOUS WELD BETWEEN SAID ABUTTING SURFACE PORTIONS OF SAID PARTS AND THE THICKNESS OF SAID YOKE HAS BEEN REDUCED TO A SELECTED THICKNESS; AND CHEMICALLY LEACHING SAID SPACER MATERIAL FROM AROUND SAID PARTS.
References Cited (Backward Citations)
US3061713A
Cited
US3321826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |