Patent US2428568A successfully refreshed from Google Patents.
US2428568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supervisory system for temperature indicating systems
Assignee: Westinghouse Electric Corp
•
Filing: 1944-05-24
•
Granted: 1947-10-07
•
Expires: 1964-05-24
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:56
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/026
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1326304A
Cited
US1025715A
Cited
US1270851A
Cited
US1388589A
Cited
US1667595A
Cited
US1658682A
Cited
US1822989A
Cited
US1988658A
Cited
US2197635A
Cited
US2262207A
Cited
US2340605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |