US3398883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan
Assignee: CHICAGO BLOWER CORP
•
Filing: 1966-09-06
•
Granted: 1968-08-27
•
Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Ariewitz Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:23
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282; F04D29/30; F05; F05D; F05D2230/00; F05D2230/50; F05D2230/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US678223A
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US807971A
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US914283A
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GB207949A
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GB226346A
Cited
GB264440A
Cited
US1833529A
Cited
US1947148A
Cited
US1985705A
Cited
GB546768A
Cited
US2580363A
Cited
DE804024C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |