US2539095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sign letter
Assignee: Individual
•
Filing: 1948-01-12
•
Granted: 1951-01-23
•
Expires: 1968-01-12
Abstract
No abstract record available.
Inventors
- 👤 John B Mcmath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:46
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02; G09F7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2070478A
Cited
US2141955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |