US2845091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank cleaning apparatus
Assignee: MARYLAND ENGINEERING Co
•
Filing: 1954-01-18
•
Granted: 1958-07-29
•
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 15:34
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US494402A
Cited
US913811A
Cited
US844740A
Cited
US856427A
Cited
US951516A
Cited
US1023924A
Cited
US1822260A
Cited
US2332940A
Cited
US2461517A
Cited
US2601857A
Cited
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 |