US2580447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time recording system
Assignee: Individual
•
Filing: 1947-03-21
•
Granted: 1952-01-01
•
Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 Samuel G Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:31
CPC Classifications
A; A41; A41F; A41F1/00; A41F1/008; G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US700454A
Cited
US2145018A
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US2188145A
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US2116314A
Cited
US2141203A
Cited
US2271539A
Cited
US2417129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |