US2561894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification band
Assignee: Individual
•
Filing: 1948-03-01
•
Granted: 1951-07-24
•
Expires: 1968-03-01
Abstract
No abstract record available.
Inventors
- 👤 Fred R Wallich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:26
CPC Classifications
G; G09; G09F; G09F3/00; G09F3/005; G09F3/02; Y; Y10; Y10S; Y10S24/00; Y10S24/11; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1609731A
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US1830411A
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US1849774A
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US1970755A
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US1994507A
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US2020007A
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US2072221A
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US2335333A
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US2352747A
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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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |