Patent US2725685A successfully refreshed from Google Patents.
US2725685A
Expired / Lapsed
US
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Spark plug vapor blasting machine
Assignee: Individual
•
Filing: 1953-08-24
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Granted: 1955-12-06
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Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 James M Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:04
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/32; B24C3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1317809A
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US1875994A
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US1887395A
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US2351272A
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US2345884A
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US2365152A
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US2393762A
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US2454158A
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US2505422A
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US2575631A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |