US2768013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for sand distributing mechanism
Assignee: Napco Industries Inc
•
Filing: 1953-09-17
•
Granted: 1956-10-23
•
Expires: 1973-09-17
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:29
CPC Classifications
B; B60; B60B; B60B39/00; B60B39/02; B60B39/04; B60B39/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US848519A
Cited
US2212865A
Cited
US2571378A
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US2435758A
Cited
US2522677A
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US2674478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |