Patent US1069436A successfully refreshed from Google Patents.
US2440468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window ventilator
Assignee: Individual
•
Filing: 1945-02-08
•
Granted: 1948-04-27
•
Expires: 1965-02-08
Abstract
No abstract record available.
Inventors
- 👤 John C Gerken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:34
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US930743A
Cited
US949632A
Cited
US1182749A
Cited
US1241660A
Cited
US1409050A
Cited
US1482915A
Cited
US1838207A
Cited
US1650946A
Cited
US1785682A
Cited
US2265881A
Cited
US2340570A
Cited
US2356325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |