Patent US3371855A successfully refreshed from Google Patents.
US3371855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air directing device
Assignee: Bruns Technology Inc
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Filing: 1966-02-25
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Granted: 1968-03-05
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Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Bruns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:56
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/522; F04D29/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US461051A
Cited
US984549A
Cited
US1427859A
Cited
GB429958A
Cited
GB429959A
Cited
US2100946A
Cited
DE884850C
Cited
US2653754A
Cited
US2814433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |