Patent US3297998A successfully refreshed from Google Patents.
US1600842A
Expired / Lapsed
US
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Electrostatic apparatus
Assignee: General Electric Co
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Filing: 1923-09-05
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Granted: 1926-09-21
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Expires: 1943-09-05
Abstract
No abstract record available.
Inventors
- 👤 Philips James Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
H; H02; H02M; H02M11/00
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) | 1929-09-20 | 1930-03-22 | 1930-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-09-20 | 1934-03-22 | 1934-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-09-20 | 1938-03-22 | 1938-09-21 | $7700.00 | Window Closed / Lapsed |