Patent US2639655A successfully refreshed from Google Patents.
US2639655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air register
Assignee: Individual
•
Filing: 1950-10-05
•
Granted: 1953-05-26
•
Expires: 1970-10-05
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Whitehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:33
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)
US1844520A
Cited
US2115720A
Cited
GB525222A
Cited
US2355629A
Cited
US2363945A
Cited
US2250330A
Cited
US2359505A
Cited
US2395233A
Cited
US2483704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |