US2756379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for progressively changing current load device
Assignee: Individual
•
Filing: 1953-08-19
•
Granted: 1956-07-24
•
Expires: 1973-08-19
Abstract
No abstract record available.
Inventors
- 👤 Robert Seaward Van Benthyuysen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:24
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J2207/00; H02J2207/20; Y; Y10; Y10S; Y10S320/00; Y10S320/28; Y10S320/29; Y10S320/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US397616A
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US674942A
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US877258A
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US1255535A
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DE635285C
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US2066509A
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US2187523A
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US2474761A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |