Patent US3049985A successfully refreshed from Google Patents.
US3049985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louver type damper
Assignee: American Foundry and Furnace Co
•
Filing: 1959-01-19
•
Granted: 1962-08-21
•
Expires: 1979-01-19
Abstract
No abstract record available.
Inventors
- 👤 William J Klingberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:14
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/084; F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/8741; Y10T137/87442; Y10T137/87467; Y10T137/87483
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1482435A
Cited
US1878190A
Cited
US1751658A
Cited
US1904654A
Cited
US1926120A
Cited
US2040893A
Cited
US2331758A
Cited
US2303254A
Cited
US2853935A
Cited
US2863374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |