US2767804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Meter protection and signal circuit for electric precipitators
Assignee: Western Precipitation Corp
•
Filing: 1953-03-23
•
Granted: 1956-10-23
•
Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Michael P Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:09
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66; B03C3/68
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR609989A
Cited
GB313208A
Cited
US1976569A
Cited
GB521316A
Cited
US2247361A
Cited
GB557336A
Cited
US2451953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |