US2169331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower for annealing furnaces and the like
Assignee: COPPUS ENGINEERING Corp
•
Filing: 1937-02-17
•
Granted: 1939-08-15
•
Expires: 1957-02-17
Abstract
No abstract record available.
Inventors
- 👤 Wechsberg Otto
- 👤 Werner Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:36
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/053; F04D19/00; F04D25/00; F04D25/02; F04D25/06; F04D25/0606; F04D29/056; F04D29/059
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-08-14 | 1943-02-13 | 1943-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-14 | 1947-02-13 | 1947-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-14 | 1951-02-13 | 1951-08-15 | $7700.00 | Window Closed / Lapsed |