US3260189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilation system
Assignee: Individual
•
Filing: 1963-10-29
•
Granted: 1966-07-12
•
Expires: 1983-10-29
Abstract
No abstract record available.
Inventors
- 👤 Donald D Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:53
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; F24C15/2028; F24C15/2042; Y; Y10; Y10S; Y10S55/00; Y10S55/29; Y10S55/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125869A
Cited
US1287027A
Cited
US2312272A
Cited
US3134243A
Cited
US3131687A
Cited
US3111077A
Cited
US3131688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |