US2359476A
Expired / Lapsed
US
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Electrostatic method and apparatus
Assignee: Harper J Ransburg Co Inc
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Filing: 1940-01-15
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Granted: 1944-10-03
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Expires: 1960-01-15
Abstract
No abstract record available.
Inventors
- 👤 Charles K Gravley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:52
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/14; B05C; B05C3/00; B05C3/02; B05C3/09; B05C3/10; H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; B05D1/00; B05D1/02; B05D1/18; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-10-03 | 1948-04-03 | 1948-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-10-03 | 1952-04-03 | 1952-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-10-03 | 1956-04-03 | 1956-10-03 | $7700.00 | Window Closed / Lapsed |