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US2564227A
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US
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Calculating device
Assignee: Individual
•
Filing: 1947-06-16
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Granted: 1951-08-14
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Expires: 1967-06-16
Abstract
No abstract record available.
Inventors
- 👤 Paul M Pepper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:19
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/02; G06G1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US486070A
Cited
US1435512A
Cited
US1211581A
Cited
GB191228603A
Cited
US1207439A
Cited
US1436282A
Cited
FR533945A
Cited
US1404019A
Cited
GB180695A
Cited
US2426362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |