US2974204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer
Assignee: DU KANE CORP
•
Filing: 1954-07-06
•
Granted: 1961-03-07
•
Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Michael C Supitilov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:06
CPC Classifications
B; B29; B29C; B29C43/00; B29D; B29D99/00; B29D99/005; H; H04; H04R; H04R31/00; H04R31/003; H04R7/00; H04R7/02; H04R7/12; H04R7/127; H04R7/14; H04R9/00; B29L; B29L2031/00; B29L2031/755
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |