US2549930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective tempering by induction means
Assignee: Caterpillar Inc
•
Filing: 1949-09-19
•
Granted: 1951-04-24
•
Expires: 1969-09-19
Abstract
No abstract record available.
Inventors
- 👤 Glen C Riegel
- 👤 Edward E Alexander
- 👤 Walter H Lenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/40; B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/26; B62D55/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49448; Y10T29/49449
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22322E
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US1998496A
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US2288644A
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US2477029A
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US2474703A
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US2467201A
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US2484333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |