US2501440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy fastening element
Assignee: Alcoa Corp
•
Filing: 1947-07-25
•
Granted: 1950-03-21
•
Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Edgar H Dix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:43
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06; C22C21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A FASTENING ELEMENT COMPOSED OF AN ALUMINUM ALLOY CONTAINING MAGNESIUM AND SILICON IN THE PROPORTION NECESSARY TO FORM 1 TO 2.5 PER CENT MG2SI, WITHOUT EXCESS OF EITHER ELEMENT, 0.1 TO 0.5 PER CENT COPPER, AT LEAST ONE OF THE HARDENING METALS OF THE GROUPS CONSISTING OF 0.1 TO 0.5 PER CENT CHROMIUM AND 0.25 TO 1 PER CENT MANGANESE, AT LEAST ONE OF THE GRAIN REFINING METALS OF THE GROUP CONSISTING OF BORON, TITANIUM, ZIRCONIUM AND MOLYBDENUM, IN AMOUNTS OF 0.001 TO 1 PER CENT, AND BALANCE ALUMINUM AND IMPURITIES, AND FASTENING ELEMENT BEING CHARACTERIZED BY AN INTERNAL STRUCTURE IN ITS SHANK SECTION PRODUCED BY SOLUTION HEAT TREATMENT, COLD WORKING 20 TO 80 PER CENT AND ARTIFICIAL AGING, A YIELD STRENGTH EXCEEDING 45,000 P. S. I. AND A DUCTILITY THAT PERMITS BENDING BACK OF THE ELEMENT UPON ITSELF OVER A RADIUS EQUAL TO THAT OF THE SHRANK WITHOUT DEVELOPING THE BREAKS.
Claim 2
Dependent Claim
152 words
A FASTENING ELEMENT COMPOSED OF AN ALUMINUM ALLOY CONTAINING MAGNESIUM AND SILICON IN THE PROPORTION NECESSARY TO FORM 1 TO 2.5 PER CENT MG2SI, WITHOUT EXCESS OF EITHER ELEMENT, 0.1 TO 0.5 PER CENT COPPER, AT LEAST ONE OF THE HARDENING METALS OF THE GROUPS CONSISTING OF 0.1 TO 0.5 PER CENT CHROMIUM AND 0.25 TO 1 PER CENT MANGANESE, AT LEAST ONE OF THE GRAIN REFINING METALS OF THE GROUP CONSISTING OF BORON, TITANIUM, ZIRCONIUM AND MOLYBDENUM, IN AMOUNTS OF 0.001 TO 1 PER CENT, AND BALANCE ALUMINUM AND IMPURITIES, AND FASTENING ELEMENT BEING CHARACTERIZED BY AN INTERNAL STRUCTURE IN ITS SHANK SECTION PRODUCED BY SOLUTION HEAT TREATMENT, COLD WORKING 20 TO 80 PER CENT AND ARTIFICIAL AGING, A YIELD STRENGTH EXCEEDING 45,000 P. S. I. AND A DUCTILITY THAT PERMITS BENDING BACK OF THE ELEMENT UPON ITSELF OVER A RADIUS EQUAL TO THAT OF THE SHRANK WITHOUT DEVELOPING THE BREAKS.
References Cited (Backward Citations)
US2070833A
Cited
US2394546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |