US2765161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jig for selective hardening of steel rings
Assignee: Individual
•
Filing: 1952-06-03
•
Granted: 1956-10-02
•
Expires: 1972-06-03
Abstract
No abstract record available.
Inventors
- 👤 Sr Thomas Mungall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:46
CPC Classifications
C; C21; C21D; C21D1/00; C21D9/00; C21D9/40; G; G04; G04D; G04D3/00; G04D3/0069; G04D3/0074; H; H01; H01F; H01F13/00; H01F13/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US153115A
Cited
US220681A
Cited
US232112A
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US442065A
Cited
US1715713A
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US1848364A
Cited
US2572201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |