US2750744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefill valve with automatic decompression means
Assignee: American Steel Foundries
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Filing: 1952-11-04
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Granted: 1956-06-19
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Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 Robert K Sedgwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:41
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/18; B30B15/183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |