Patent US2889501A successfully refreshed from Google Patents.
US2889501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage variable vacuum capacitor
Assignee: VACAP Corp
•
Filing: 1956-05-03
•
Granted: 1959-06-02
•
Expires: 1976-05-03
Abstract
No abstract record available.
Inventors
- 👤 Henry J Wilkens
- 👤 Dolinko Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:41
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/14; H01G4/00; H01G4/002; H01G4/018; H01G4/02; H01G5/40; H01G2005/02
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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |