Patent US2553707A successfully refreshed from Google Patents.
US2553707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel spring
Assignee: Armco Inc
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Filing: 1947-01-31
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Granted: 1951-05-22
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Expires: 1967-01-31
Abstract
No abstract record available.
Inventors
- 👤 George N Goller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:50
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/02; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
COLD-WORKED AND PRECIPITATION-HARDENED STAINLESS STEEL WIRE, SHEET AND STRIP SPRINGS, HAVIONG A PROPORTIONAL LIMIT OF ABOUT 40,000 TO 230,000 P. S. I. OR MORE, SAID STEEL CONTAINING CHROMIUM AND NICKEL IN AMOUNTS SUBSTANTIALLY IN ACCORDANCE WITH AREA ABCD IN THE ACCOMPANYING DIAGRAM, CARBON BETWEEN ABOUT 0.02% AND 0.12%, ABOUT 0.50% TO 2.50% ALUMINUM, FROM INCIDENTAL AMOUNTS UP TO APPROXIMATELY 8.0% MANGANESE, FROM INCIDENTAL AMOUNTS UP TO
Claim 2
Dependent Claim
66 words
COLD-WORKED AND PRECIPITATION-HARDENED STAINLESS STEEL WIRE, SHEET AND STRIP SPRINGS, HAVIONG A PROPORTIONAL LIMIT OF ABOUT 40,000 TO 230,000 P. S. I. OR MORE, SAID STEEL CONTAINING CHROMIUM AND NICKEL IN AMOUNTS SUBSTANTIALLY IN ACCORDANCE WITH AREA ABCD IN THE ACCOMPANYING DIAGRAM, CARBON BETWEEN ABOUT 0.02% AND 0.12%, ABOUT 0.50% TO 2.50% ALUMINUM, FROM INCIDENTAL AMOUNTS UP TO APPROXIMATELY 8.0% MANGANESE, FROM INCIDENTAL AMOUNTS UP TO
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |