US2448513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic condenser plate
Assignee: Individual
•
Filing: 1942-11-26
•
Granted: 1948-09-07
•
Expires: 1962-11-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Brennan
- 👤 Conrad Leona Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:46
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1751213A
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US1843622A
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GB388787A
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GB385763A
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US2098774A
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US1986162A
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US1947112A
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US2007792A
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US2318184A
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US2346658A
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US2294717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |