US2568577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reading pacer apparatus
Assignee: KEYSTONE VIEW Co
•
Filing: 1951-01-23
•
Granted: 1951-09-18
•
Expires: 1971-01-23
Abstract
No abstract record available.
Inventors
- 👤 Henry S Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:34
CPC Classifications
G; G09; G09B; G09B17/00; G09B17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1587886A
Cited
US1920024A
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US1963880A
Cited
US2078834A
Cited
US2061532A
Cited
US2098020A
Cited
US2265924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |