US3353284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic number line board
Assignee: La Pine Scientific Co
•
Filing: 1965-07-16
•
Granted: 1967-11-21
•
Expires: 1985-07-16
Abstract
No abstract record available.
Inventors
- 👤 Hursh Ronald
- 👤 Ringhofer Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:39
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/02; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1165058A
Cited
US1735883A
Cited
US2091661A
Cited
US2599320A
Cited
US2722754A
Cited
GB842480A
Cited
US3224126A
Cited
US3276151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |