Patent US2452233A successfully refreshed from Google Patents.
US2452233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent fault isolator time-delay switch
Assignee: PACIFIC ELECTRIC Manufacturing CORP
•
Filing: 1945-07-24
•
Granted: 1948-10-26
•
Expires: 1965-07-24
Abstract
No abstract record available.
Inventors
- 👤 Roy H Gerard
- 👤 Roy M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:51
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/44; H01H75/00; H01H75/02; H01H75/04; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1558; Y10T74/1565; Y10T74/1576; Y10T74/21; Y10T74/2133
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1402898A
Cited
US1737649A
Cited
US1805082A
Cited
US1982986A
Cited
US2287676A
Cited
US2334339A
Cited
US2387372A
Cited
US2387373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |