Patent US3539841A successfully refreshed from Google Patents.
US3539841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric voltage generator
Assignee: Motorola Solutions Inc
•
Filing: 1968-02-21
•
Granted: 1970-11-10
•
Expires: 1988-02-21
Abstract
No abstract record available.
Inventors
- 👤 James A Riff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:57
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2945192A
Cited
US3173055A
Cited
US3247423A
Cited
US3350583A
Cited
US3215133A
Cited
US3208443A
Cited
US3332409A
Cited
US3354327A
Cited
US3397683A
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 |