US2709077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for prevention of tool deformation during hardening
Assignee: ERNEST A LOMBARDI
•
Filing: 1954-04-26
•
Granted: 1955-05-24
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 John E Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:52
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/673; Y; Y10; Y10S; Y10S81/00; Y10S81/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US410414A
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US468272A
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US654880A
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US817513A
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US920797A
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US2394709A
Cited
US2585594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |