US2520566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grit blasting apparatus and the like
Assignee: Sargrove Electronics Ltd
•
Filing: 1948-02-25
•
Granted: 1950-08-29
•
Expires: 1968-02-25
Abstract
No abstract record available.
Inventors
- 👤 Sargrove John Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:42
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/08; B24C3/10; B24C3/12; B24C7/00; B24C7/0046; B24C7/0069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US365281A
Cited
US727030A
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US1073149A
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US1884791A
Cited
US1867856A
Cited
GB439982A
Cited
US2345648A
Cited
US2431354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |