US2702841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutral relay
Assignee: NATHANIEL A KARR
•
Filing: 1952-07-19
•
Granted: 1955-02-22
•
Expires: 1972-07-19
Abstract
No abstract record available.
Inventors
- 👤 Allan C Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H01H51/2272; H01H51/2281; H01H1/00; H01H1/58; H01H1/5805; H01H50/00; H01H50/14; H01H50/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US799016A
Cited
US1562646A
Cited
US1525697A
Cited
US1901443A
Cited
US2066511A
Cited
US2229585A
Cited
US2203888A
Cited
DE726920C
Cited
US2344809A
Cited
US2616994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |