Patent US4065316A successfully refreshed from Google Patents.
Patent US2498737A successfully refreshed from Google Patents.
US2498737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical transducer
Assignee: WILLIAM H T HOLDEN
•
Filing: 1946-06-07
•
Granted: 1950-02-28
•
Expires: 1966-06-07
Abstract
No abstract record available.
Inventors
- 👤 Cora E Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0666; Y; Y10; Y10S; Y10S116/00; Y10S116/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1734926A
Cited
US1959429A
Cited
US2138051A
Cited
US2163649A
Cited
US2323030A
Cited
US2327487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |