US3463391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air duct assembly,particularly for a stable or the like
Assignee: BIG DUTCHMAN INTERN AG
•
Filing: 1968-04-24
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Granted: 1969-08-26
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Expires: 1988-04-24
Abstract
No abstract record available.
Inventors
- 👤 Anthonius J T Haegens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:33
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1426; A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0058; A01K31/00; F24F12/00; F24F12/001; F24F13/02; F24F13/06; F24F13/1413; F24F7/00; F24F7/02; F24F7/025; F24F2013/1453; F24F2013/1473; Y; Y02; Y02A; Y02A40/00; Y02A40/70; Y02A40/76; Y02B; Y02B30/00; Y02B30/56; Y02P; Y02P60/00; Y02P60/12; Y02P60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3401621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |