US2770009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube cooling blower
Assignee: DuPont Canada Inc
•
Filing: 1955-02-03
•
Granted: 1956-11-13
•
Expires: 1975-02-03
Abstract
No abstract record available.
Inventors
- 👤 Edward H Rogal
- 👤 Martynse Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:05
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/885; B29C48/03; B29C48/09; B29C48/10; B29C48/911; B29C48/9115; B29C48/912; F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/445; F04D29/448
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2607078A
Cited
US2632206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |