US2983847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for grounding electrostatic charges
Assignee: Individual
•
Filing: 1959-06-09
•
Granted: 1961-05-09
•
Expires: 1979-06-09
Abstract
No abstract record available.
Inventors
- 👤 Spengler Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:16
CPC Classifications
H; H01; H01T; H01T14/00; H05; H05F; H05F3/00; H05F3/04
Claims Analysis
Total Claims: 0
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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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |