US2900128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser for portable electric fan
Assignee: Markel Electric Products Inc
•
Filing: 1956-11-15
•
Granted: 1959-08-18
•
Expires: 1976-11-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard C Piper
- 👤 Dennis R Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:58
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/522; F04D29/526; F04D29/70; F04D29/701; F04D29/703
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US701228A
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US805247A
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US1192857A
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US2199525A
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US2307586A
Cited
US2415621A
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US2571726A
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US2650535A
Cited
US2776089A
Cited
US2684025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |