US2848576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-pneumatic differential pressure switch system
Assignee: Schneider Electric Systems USA Inc
•
Filing: 1956-04-02
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Granted: 1958-08-19
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Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 John H Bolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:10
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/30; H01H35/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23536E
Cited
US1381139A
Cited
US1987200A
Cited
US2242656A
Cited
US2521477A
Cited
US2626626A
Cited
US2658392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |