Patent US3048720A successfully refreshed from Google Patents.
US3048720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging system for electrostatic generators
Assignee: High Voltage Engineering Corp
•
Filing: 1958-09-15
•
Granted: 1962-08-07
•
Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 Robert W Cloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:55
CPC Classifications
H; H02; H02N; H02N1/00; H02N1/06; H02N1/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |