US3510963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching system
Assignee: Hickok Teaching Systems Inc
•
Filing: 1968-08-28
•
Granted: 1970-05-12
•
Expires: 1988-08-28
Abstract
No abstract record available.
Inventors
- 👤 Paul B Zbar
- 👤 Howard Bruce Boal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:04
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/06; G09B23/18; G09B23/183; G09B23/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB123170A
Cited
US2374800A
Cited
US2592552A
Cited
US2568535A
Cited
US2643466A
Cited
US2878587A
Cited
US2941314A
Cited
US3038139A
Cited
US3011269A
Cited
GB916838A
Cited
US3277589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |