US2433942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow device
Assignee: Cooper Industries LLC
•
Filing: 1943-10-11
•
Granted: 1948-01-06
•
Expires: 1963-10-11
Abstract
No abstract record available.
Inventors
- 👤 Madden T Works
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:08
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1956694A
Cited
US2041439A
Cited
US2290141A
Cited
US2274407A
Cited
US2246881A
Cited
US2297020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |