US2875846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure cleaning apparatus
Assignee: Individual
•
Filing: 1955-04-04
•
Granted: 1959-03-03
•
Expires: 1975-04-04
Abstract
No abstract record available.
Inventors
- 👤 Edward H Yonkers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:25
CPC Classifications
B; B08; B08B; B08B5/00; B41; B41F; B41F23/00; B41F23/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2516680A
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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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |