Patent US3490208A successfully refreshed from Google Patents.
US3490208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial heavy-duty vacuum cleaner
Assignee: JAMES E SIEGELE
•
Filing: 1966-08-25
•
Granted: 1970-01-20
•
Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Leonard Meyer
- 👤 James E Siegele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:11
CPC Classifications
A; A47; A47L; A47L7/00
Claims Analysis
Total Claims: 0
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |