US3021778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louvered ventilating devices and method for producing same
Assignee: Individual
•
Filing: 1959-07-16
•
Granted: 1962-02-20
•
Expires: 1979-07-16
Abstract
No abstract record available.
Inventors
- 👤 Slatkovski Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/082; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US421165A
Cited
US1118365A
Cited
US2097927A
Cited
US2309717A
Cited
US2580282A
Cited
US2752844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |