US2477384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclograph for testing metals
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1943-11-09
•
Granted: 1949-07-26
•
Expires: 1963-11-09
Abstract
No abstract record available.
Inventors
- 👤 Mann Estle Ray
- 👤 Beste Harold Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:31
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/023; H; H05; H05B; H05B6/00; H05B6/02; H05B6/06
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |