US2834543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplying and dividing means for electronic calculators
Assignee: Monroe Calculating Machine Co
•
Filing: 1952-07-12
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Granted: 1958-05-13
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Expires: 1972-07-12
Abstract
No abstract record available.
Inventors
- 👤 William H Burkhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:20
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/4915; G06F7/4917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2344885A
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US2611813A
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US2609143A
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US2623115A
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US2712898A
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US2590950A
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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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |