US2792993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculating device
Assignee: Individual
•
Filing: 1953-03-31
•
Granted: 1957-05-21
•
Expires: 1973-03-31
Abstract
No abstract record available.
Inventors
- 👤 Schramm Ella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/02; G06; G06G; G06G1/00; G06G1/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US623415A
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US1311682A
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US2222272A
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US634779A
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US804646A
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US871417A
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US1346930A
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US1507333A
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US1728584A
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US1992366A
Cited
GB407078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |