US2659294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window ventilator
Assignee: Individual
•
Filing: 1948-01-02
•
Granted: 1953-11-17
•
Expires: 1968-01-02
Abstract
No abstract record available.
Inventors
- 👤 Hersperger Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:54
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/007; F24F7/013
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR354663A
Cited
US1734691A
Cited
US1769922A
Cited
US2265317A
Cited
US2337325A
Cited
US2373496A
Cited
US2359571A
Cited
GB580093A
Cited
US2405411A
Cited
US2456391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |