US2268819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste and overflow valve
Assignee: John B. Pierce Laboratory
•
Filing: 1939-05-11
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Granted: 1942-01-06
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Expires: 1959-05-11
Abstract
No abstract record available.
Inventors
- 👤 William C Groeniger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:15
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/22; E03C1/23; E03C1/2302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-05 | 1945-07-07 | 1946-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-05 | 1949-07-07 | 1950-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-05 | 1953-07-07 | 1954-01-06 | $7700.00 | Window Closed / Lapsed |