US2048677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for blasting
Assignee: Sullivan Machinery Co
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Filing: 1933-06-21
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Granted: 1936-07-28
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Expires: 1953-06-21
Abstract
No abstract record available.
Inventors
- 👤 John F Berteling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/104; E; E21; E21B; E21B7/00; E21B7/12; E21B7/124; E21B7/1245; F; F42; F42D; F42D1/00; F42D1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-07-28 | 1940-01-27 | 1940-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-28 | 1944-01-27 | 1944-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-28 | 1948-01-27 | 1948-07-28 | $7700.00 | Window Closed / Lapsed |