US2581420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloys
Assignee: Driver Harris Co
•
Filing: 1949-09-23
•
Granted: 1952-01-08
•
Expires: 1969-09-23
Abstract
No abstract record available.
Inventors
- 👤 James M Lohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A NICKEL - CHROMIUM - IRON ALLOY CONSISTING ESSENTIALLY OF 50 TO 70 PERCENT NICKEL, 10 TO 25 PERCENT CHROMIUM, .01 TO .20 PERCERNT CALCIUM, .01 TO 1.0 PERCENT ALUMINUM, A TRACE TO .50 PERCENT OF A RARE EARTH METAL, BALANCE ESSENTIALLY IRON.
Claim 2
Dependent Claim
43 words
A NICKEL - CHROMIUM - IRON ALLOY CONSISTING ESSENTIALLY OF 50 TO 70 PERCENT NICKEL, 10 TO 25 PERCENT CHROMIUM, .01 TO .20 PERCERNT CALCIUM, .01 TO 1.0 PERCENT ALUMINUM, A TRACE TO .50 PERCENT OF A RARE EARTH METAL, BALANCE ESSENTIALLY IRON.
References Cited (Backward Citations)
US2005431A
Cited
GB488926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |