US2960368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand suction apparatus
Assignee: Individual
•
Filing: 1958-06-04
•
Granted: 1960-11-15
•
Expires: 1978-06-04
Abstract
No abstract record available.
Inventors
- 👤 Watanabe Hideyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/8808; E02F3/90; E02F3/92; E02F3/9206; E02F3/9243; E02F3/925; E02F7/00; E02F7/10; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/065
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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |