US2754747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air register or louver
Assignee: Individual
•
Filing: 1953-03-20
•
Granted: 1956-07-17
•
Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 Herman G Bertling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:19
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1705418A
Cited
US1502844A
Cited
US1841347A
Cited
US1952707A
Cited
US1946788A
Cited
US2136065A
Cited
US2155018A
Cited
US2246602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |