US1780179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable high and low pressure switch alarm
Assignee: Individual
•
Filing: 1928-07-03
•
Granted: 1930-11-04
•
Expires: 1948-07-03
Abstract
No abstract record available.
Inventors
- 👤 William C Elliott
- 👤 Earl S Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34
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) | 1933-11-03 | 1934-05-05 | 1934-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-11-03 | 1938-05-05 | 1938-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-11-03 | 1942-05-05 | 1942-11-04 | $7700.00 | Window Closed / Lapsed |