US3493695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid
Assignee: FREDRICK J STORK
•
Filing: 1967-03-10
•
Granted: 1970-02-03
•
Expires: 1987-03-10
Abstract
No abstract record available.
Inventors
- 👤 Fredrick J Stork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:45
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183; H04; H04R; H04R25/00; H04R25/55; H04R25/556; H04R2225/00; H04R2225/31; Y; Y10; Y10S; Y10S320/00; Y10S320/15; Y10S320/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR801742A
Cited
US3327070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |