US3533159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a semiconductive transducer
Assignee: Hudson Corp
•
Filing: 1968-04-08
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Granted: 1970-10-13
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Expires: 1988-04-08
Abstract
No abstract record available.
Inventors
- 👤 Edward C Hudson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:26
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/33; H; H04; H04R; H04R23/00; H04R23/006; H10; H10D; H10D48/00; H10D48/40; Y; Y10; Y10S; Y10S438/00; Y10S438/914; Y10S438/919; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3473979A
Cited
US3293087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |