Patent US3844445A successfully refreshed from Google Patents.
Patent US2729171A successfully refreshed from Google Patents.
Patent US2418568A successfully refreshed from Google Patents.
Patent US3191150A successfully refreshed from Google Patents.
Patent US2352179A successfully refreshed from Google Patents.
US2989714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit element
Assignee: Arthur D Little Inc
•
Filing: 1958-06-25
•
Granted: 1961-06-20
•
Expires: 1978-06-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward C Park
- 👤 Smallman Carl Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:29
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; H; H10; H10N; H10N60/00; H10N60/30; H10N60/35; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/856; Y10S505/857
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2189122A
Cited
US2599550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |