Patent US3513633A successfully refreshed from Google Patents.
US3513633A
Expired / Lapsed
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Filter and electrostatic precipitator in reel form
Assignee: JAMES O GLORVIG
•
Filing: 1967-09-07
•
Granted: 1970-05-26
•
Expires: 1987-09-07
Abstract
No abstract record available.
Inventors
- 👤 James O Glorvig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:24
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40
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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |