US2552452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank cleaner and oil treater
Assignee: Individual
•
Filing: 1948-08-26
•
Granted: 1951-05-08
•
Expires: 1968-08-26
Abstract
No abstract record available.
Inventors
- 👤 Willis W Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:57
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/08; B08B9/093; B08B9/0933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US503577A
Cited
DE332924C
Cited
US1478222A
Cited
US1947851A
Cited
DE564068C
Cited
US2263790A
Cited
US2277210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |