US3395463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chess machine
Assignee: Individual
•
Filing: 1966-04-21
•
Granted: 1968-08-06
•
Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Donald G Worden
- 👤 Fred C Worden
- 👤 Robert O Diedrichs
- 👤 Robert E Trowbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1642810A
Cited
US1607226A
Cited
US2298456A
Cited
US2490092A
Cited
US2647749A
Cited
FR1066495A
Cited
US2944734A
Cited
US3191315A
Cited
US3319356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |