Patent US2629309A successfully refreshed from Google Patents.
US2629309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for hot-air radiant heating
Assignee: FOREST GLEN AYERS
•
Filing: 1950-08-18
•
Granted: 1953-02-24
•
Expires: 1970-08-18
Abstract
No abstract record available.
Inventors
- 👤 Anard A Lahti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:18
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/06; F24D5/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US509332A
Cited
US1811231A
Cited
US1961948A
Cited
US2192007A
Cited
US2192567A
Cited
US2203120A
Cited
US2195691A
Cited
US2364265A
Cited
US2422685A
Cited
US2465184A
Cited
US2555978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |