Patent US3387216A successfully refreshed from Google Patents.
US3387216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triggered spark gap electronic protector
Assignee: United States Department of the Navy
•
Filing: 1965-06-18
•
Granted: 1968-06-04
•
Expires: 1985-06-18
Abstract
No abstract record available.
Inventors
- 👤 Richard P Gagliardi
- 👤 Jr Louis C Metz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:12
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/548; H02; H02H; H02H3/00; H02H3/02; H02H3/021; H02H3/023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2815446A
Cited
US2723371A
Cited
US2840766A
Cited
US3206644A
Cited
US3254195A
Cited
US3230459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |