US3539401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing mechano-electrical transducer
Assignee: Panasonic Holdings Corp
•
Filing: 1967-05-15
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Granted: 1970-11-10
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Akio Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:07
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/50; H04; H04N; H04N3/00; H04N3/10; H04R; H04R23/00; H04R23/006; H10P; H10P95/00; H10P95/90; Y; Y10; Y10S; Y10S148/00; Y10S148/023; Y10T; Y10T29/00; Y10T29/42; Y10T29/49; Y10T29/49002; Y10T29/49007; Y10T29/49082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2964689A
Cited
US3132408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |