US2627430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air duct
Assignee: Individual
•
Filing: 1950-02-15
•
Granted: 1953-02-03
•
Expires: 1970-02-15
Abstract
No abstract record available.
Inventors
- 👤 Koffler Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:37
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/0209; F16; F16L; F16L23/00; F16L23/12; F16L23/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US381756A
Cited
US641580A
Cited
US726004A
Cited
US760216A
Cited
US1484491A
Cited
US2126014A
Cited
US2332641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-03 | 1956-08-04 | 1957-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-03 | 1960-08-04 | 1961-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-03 | 1964-08-04 | 1965-02-03 | $7700.00 | Window Closed / Lapsed |