Patent US3470716A successfully refreshed from Google Patents.
US3470716A
Expired / Lapsed
US
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Electrostatic apparatus
Assignee: Individual
•
Filing: 1968-01-31
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Granted: 1969-10-07
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Expires: 1988-01-31
Abstract
No abstract record available.
Inventors
- 👤 Robert R Candor
- 👤 James T Candor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:28
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/48; F; F24; F24C; F24C7/00; D; D06; D06F; D06F39/00; D06F39/08; D06F39/083
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) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |