Patent US2444648A successfully refreshed from Google Patents.
US2444648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current distribution duct
Assignee: Schneider Electric USA Inc
•
Filing: 1942-05-05
•
Granted: 1948-07-06
•
Expires: 1962-05-05
Abstract
No abstract record available.
Inventors
- 👤 John G Jackson
- 👤 Ralph H Kingdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:53
CPC Classifications
H; H02; H02G; H02G5/00; H02G5/06; H02G5/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US461195A
Cited
US1433827A
Cited
US1640814A
Cited
US1965181A
Cited
US1986965A
Cited
US1967340A
Cited
US2037026A
Cited
US2043796A
Cited
US2009376A
Cited
US2088105A
Cited
US2122298A
Cited
US2096313A
Cited
US2161571A
Cited
US2211109A
Cited
US2124269A
Cited
US2170299A
Cited
US2192899A
Cited
US2261857A
Cited
US2264075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |