Patent US3017997A successfully refreshed from Google Patents.
US3017997A
Expired / Lapsed
US
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Endless belt and drum type vacuum filter
Assignee: Komline Sanderson Engineering Corp
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Filing: 1960-03-21
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Granted: 1962-01-23
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph O Hawkes
- 👤 Harold G Hawkes
- 👤 Robert M Morrison
- 👤 Aden R Sirles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:27
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/044; B01D33/048; B01D33/06; B01D33/073; B01D33/80; B01D33/801; B01D33/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |