US3343474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building with a vent device
Assignee: Individual
•
Filing: 1965-09-16
•
Granted: 1967-09-26
•
Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Sohda Yoshitoshi
- 👤 Sohda Yoshimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/7608; E04B1/7612; F; F24; F24F; F24F7/00; F24F7/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1086031A
Cited
US1131437A
Cited
US2517020A
Cited
US2889763A
Cited
US3049067A
Cited
US3223018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |