US2528130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for blowing air into a room
Assignee: Svenska Flaktfabriken AB
•
Filing: 1947-03-28
•
Granted: 1950-10-31
•
Expires: 1967-03-28
Abstract
No abstract record available.
Inventors
- 👤 Frisk Nils Pontus Wilhelm
- 👤 Wallin Sven Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:52
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075; F24F13/065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US680280A
Cited
US1559057A
Cited
US1730348A
Cited
GB263953A
Cited
US1886313A
Cited
US1872007A
Cited
GB377634A
Cited
US2104279A
Cited
US2106458A
Cited
US2339629A
Cited
US2337280A
Cited
US2396025A
Cited
US2366264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |