US2925991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spouted gate valve
Assignee: Mcdowell Manufacturing Co
•
Filing: 1955-06-13
•
Granted: 1960-02-23
•
Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 Gustav A Hempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:36
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/28; B; B05; B05B; B05B1/00; B05B1/30; B05B1/3026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US149050A
Cited
US225298A
Cited
GB190513984A
Cited
US876483A
Cited
US1760946A
Cited
US2513272A
Cited
US2766005A
Cited
US2771904A
Cited
US2693203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |