US3498205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rooftop air intake unit louver
Assignee: TDK Micronas GmbH
•
Filing: 1968-07-26
•
Granted: 1970-03-03
•
Expires: 1988-07-26
Abstract
No abstract record available.
Inventors
- 👤 Franz A Kautz
- 👤 Forrest A Brewer
- 👤 Paul P Vanderneut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:52
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US532452A
Cited
US1896656A
Cited
US2737876A
Cited
US3348466A
Cited
US3358580A
Cited
US3413905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |