Patent US3401621A successfully refreshed from Google Patents.
US3401621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plant for ventilation of rooms, more particularly in stables
Assignee: Individual
•
Filing: 1966-07-06
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Granted: 1968-09-17
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Expires: 1986-07-06
Abstract
No abstract record available.
Inventors
- 👤 Aaberg Carl Peter Noe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0058; F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1413; F24F13/1426; F24F7/00; F24F7/02; F24F7/025; F24F7/04; F24F7/06; F24F7/065; F24F11/00; F24F11/30; F24F2013/1433; F24F2013/1453; F24F2110/00; F24F2110/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH157507A
Cited
US2106700A
Cited
US2532268A
Cited
US2700331A
Cited
US3122307A
Cited
US3267995A
Cited
US3221632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |