US3462133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas burner for heating moving air
Assignee: Butler Manufacturing Co
•
Filing: 1967-10-30
•
Granted: 1969-08-19
•
Expires: 1987-10-30
Abstract
No abstract record available.
Inventors
- 👤 James A Brock
- 👤 Robert H Hughes
- 👤 Edgar S Downs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:33
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/001; F23; F23D; F23D99/00; F23D99/002; F23D99/004; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0488; F24H9/00; F24H9/18; F24H9/1854; F24H9/1877; F24H9/1881; F23D2206/00; F23D2206/0094; 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)
US2985438A
Cited
GB874116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |