Patent US2560973A successfully refreshed from Google Patents.
US2560973A
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Method of forming turbine rotors
Assignee: BETHLCHEM STEEL Co
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Filing: 1945-12-03
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Granted: 1951-07-17
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Expires: 1965-12-03
Abstract
No abstract record available.
Inventors
- 👤 Walter N Martin
- 👤 John Y Riedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:14
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/28; B21J; B21J1/00; B21J1/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF FORMING A TURBINE ROTOR OF HIGH ALLOY STEEL, CONTAINING 16% CHROMIUM, 25% NICKEL, AND 6% MOLYBDENUM, WHICH CONSISTS IN HOT FORGING A BILLET SUCCESSIVELY AT A TEMPERATURE OF 1950* F. IN A PLURALITY OF SETS OF DIES TO FORM A BLANK, HEATING THE BLANK TO 2200* F. AND HOLDING IT AT THAT TEMPERATURE FOR TWO AND ONE HALF HOURS, QUENCHING THE BLANK AND THEN REHEATING THE BLANK TO 1200* F. AND HARDENING THE BLANK BY PLURALITY OF SETS OF DIES TO A RELACESSIVELY IN A PLURALITY OF SETS OF DIES TO A RELATIVELY COLD FORGING OPERATION.
Claim 2
Independent Claim
99 words
THE METHOD OF FORMING A TURBINE ROTOR OF HIGH ALLOY STEEL, CONTAINING 16% CHROMIUM, 25% NICKEL, AND 6% MOLYBDENUM, WHICH CONSISTS IN HOT FORGING A BILLET SUCCESSIVELY AT A TEMPERATURE OF 1950* F. IN A PLURALITY OF SETS OF DIES TO FORM A BLANK, HEATING THE BLANK TO 2200* F. AND HOLDING IT AT THAT TEMPERATURE FOR TWO AND ONE HALF HOURS, QUENCHING THE BLANK AND THEN REHEATING THE BLANK TO 1200* F. AND HARDENING THE BLANK BY PLURALITY OF SETS OF DIES TO A RELACESSIVELY IN A PLURALITY OF SETS OF DIES TO A RELATIVELY COLD FORGING OPERATION.
References Cited (Backward Citations)
US1345045A
Cited
US1486365A
Cited
US1675264A
Cited
US1772876A
Cited
US2080368A
Cited
US2297983A
Cited
US2398702A
Cited
US2358799A
Cited
US2393628A
Cited
US2416515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |