Patent US3807866A successfully refreshed from Google Patents.
US2839694A
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Load sensing system
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1954-07-15
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Granted: 1958-06-17
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Expires: 1974-07-15
Abstract
No abstract record available.
Inventors
- 👤 Stephen H Fairweather
- 👤 Seldner Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:03
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/38; H02J3/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2428566A
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US2509728A
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US2501340A
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US2448442A
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US2602154A
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US2608679A
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US2672585A
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US2636132A
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US2724781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |