US3497445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning and detarnishing silverware
Assignee: Ecolab Inc
•
Filing: 1967-07-28
•
Granted: 1970-02-24
•
Expires: 1987-07-28
Abstract
No abstract record available.
Inventors
- 👤 Edward D Berglund
- 👤 Carl A Miller
- 👤 Marcus I Nystuen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:47
CPC Classifications
C; C25; C25F; C25F7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA471564A
Cited
US1837826A
Cited
GB353337A
Cited
US2390282A
Cited
US2865832A
Cited
US2957813A
Cited
US3272729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |