Patent US2729918A successfully refreshed from Google Patents.
US2729918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast cleaning apparatus
Assignee: Individual
•
Filing: 1954-04-06
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Granted: 1956-01-10
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Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 William N Van Denburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:01
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/02; B24C3/06; B24C3/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1342488A
Cited
US1752664A
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US1964920A
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US1977386A
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US2326264A
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US2559295A
Cited
US2494773A
Cited
US2628455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |