Patent US2764239A successfully refreshed from Google Patents.
US2764239A
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Test scoring device
Assignee: MARX ALL CORP
•
Filing: 1953-03-11
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Granted: 1956-09-25
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Expires: 1973-03-11
Abstract
No abstract record available.
Inventors
- 👤 Sr Robert P Selby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:47
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/06; G09B3/08; B; B26; B26F; B26F1/00; B26F1/32; B26F1/36; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/371
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |