Patent US2677749A successfully refreshed from Google Patents.
US2677749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heating system
Assignee: Pyle National Co
•
Filing: 1949-10-29
•
Granted: 1954-05-04
•
Expires: 1969-10-29
Abstract
No abstract record available.
Inventors
- 👤 George K Raider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:20
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/12; F24D3/16; F24D3/165; F24D13/00; F24D13/04; 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)
GB501592A
Cited
US1880877A
Cited
US2044729A
Cited
US1997559A
Cited
US2172771A
Cited
US2181436A
Cited
US2251682A
Cited
CH212604A
Cited
US2382340A
Cited
US2405839A
Cited
US2486791A
Cited
US2509607A
Cited
US2615115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |