US3487767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan for the ventilation of buildings,e.g.,stables
Assignee: Novenco Building and Industry AS
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Filing: 1968-01-25
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Granted: 1970-01-06
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Expires: 1988-01-25
Abstract
No abstract record available.
Inventors
- 👤 Svend Helge Kristiansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:39
CPC Classifications
F; F24; F24F; F24F12/00; F24F12/001; A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0058; F04; F04D; F04D25/00; F04D25/16; F04D25/166; F04D27/00; F04D27/009; F24F7/00; F24F7/02; F24F7/025; F24F7/04; F24F7/06; F24F7/065; F24F13/00; F24F13/02; F24F13/06; F24F2013/0616; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |