US3370521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilation enclosure structure
Assignee: Dynamics Corp of America
•
Filing: 1966-04-25
•
Granted: 1968-02-27
•
Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Friedrich G Honerkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:47
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/20; F24C; F24C15/00; F24C15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2424217A
Cited
US2796015A
Cited
US2866676A
Cited
US2822742A
Cited
US3180459A
Cited
US3230025A
Cited
US3294276A
Cited
US3318647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |