US2424890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tax calculator
Assignee: —
•
Filing: —
•
Granted: 1947-07-29
•
Expires: 1964-07-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:45
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/0005; G06G1/0073; G06G1/0089; G06G1/02; G06G1/04; G06G1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US519358A
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US520114A
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US695217A
Cited
US753840A
Cited
US1129033A
Cited
US1210488A
Cited
US1881165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |