US2428605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stenographic machine
Assignee: International Business Machines Corp
•
Filing: 1944-10-21
•
Granted: 1947-10-07
•
Expires: 1964-10-21
Abstract
No abstract record available.
Inventors
- 👤 Waldemar A Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
B; B41; B41J; B41J3/00; B41J3/26; D; D01; D01D; D01D10/00; D01D10/04; D01D10/0409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2390414A
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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) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |