US2456763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency stabilization
Assignee: Hartford National Bank and Trust Co
•
Filing: 1943-05-26
•
Granted: 1948-12-21
•
Expires: 1963-05-26
Abstract
No abstract record available.
Inventors
- 👤 Ziegler Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:15
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/09
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1847160A
Cited
US2279659A
Cited
US2315050A
Cited
USRE22587E
Cited
US2285044A
Cited
US2354827A
Cited
US2377327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |