US2791013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand blowing machine
Assignee: Individual
•
Filing: 1954-02-23
•
Granted: 1957-05-07
•
Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 John N Demmler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:02
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US377006A
Cited
US1533221A
Cited
US888004A
Cited
US1086824A
Cited
US2131935A
Cited
US2112910A
Cited
US2757424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |