Patent US2845091A successfully refreshed from Google Patents.
US2845091A
Expired / Lapsed
US
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Tank cleaning apparatus
Assignee: MARYLAND ENGINEERING Co
•
Filing: 1954-01-18
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Granted: 1958-07-29
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Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Neer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:59
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/08; B08B9/093; B08B9/0933; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86236; Y10T137/86244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US913811A
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US844740A
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US856427A
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US951516A
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US1023924A
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US1822260A
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US2332940A
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US2461517A
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US2601857A
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US2612998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |