Patent US3075607A successfully refreshed from Google Patents.
Patent US3134295A successfully refreshed from Google Patents.
Patent US2698904A successfully refreshed from Google Patents.
US2698904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency-stabilizing arrangement
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-05-09
•
Granted: 1955-01-04
•
Expires: 1971-05-09
Abstract
No abstract record available.
Inventors
- 👤 Hugenholtz Eduard Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:18
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/30; H04B1/302; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/047; H03J7/18; H03J7/20; H03J7/24; H03J7/26; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/10; H03L7/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |