US2686991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast cleaning apparatus and method
Assignee: Pangborn Corp
•
Filing: 1950-11-07
•
Granted: 1954-08-24
•
Expires: 1970-11-07
Abstract
No abstract record available.
Inventors
- 👤 George W Powell
- 👤 Clayton E Brunner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:39
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US415230A
Cited
US1605731A
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US1637196A
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US2154843A
Cited
US2154879A
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US2131769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |