US2486748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide rule
Assignee: Individual
•
Filing: 1945-01-03
•
Granted: 1949-11-01
•
Expires: 1965-01-03
Abstract
No abstract record available.
Inventors
- 👤 Francis L Koenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:14
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/02; G06G1/04; G09; G09F; G09F23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US732072A
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US747098A
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US854325A
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US1021484A
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US1181672A
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US1249049A
Cited
US1459857A
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US1461975A
Cited
FR580985A
Cited
US1659739A
Cited
US1875927A
Cited
DE571181C
Cited
GB413308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |