US2477394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heating bar joist
Assignee: Individual
•
Filing: 1946-07-18
•
Granted: 1949-07-26
•
Expires: 1966-07-18
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Spiker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:43
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/12; F24D3/16; F24D3/165; E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/08; E04C3/09; E04C2003/0486; E04C2003/0491; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1095009A
Cited
US1431521A
Cited
US1563077A
Cited
US1597384A
Cited
US1766181A
Cited
US1744827A
Cited
US1915424A
Cited
US1899344A
Cited
US1878281A
Cited
US2063714A
Cited
US2029645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |