US3052456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner system for a furnace or the like using preheated air for combustion
Assignee: SWINDELL DRESSLER CORP
•
Filing: 1957-10-10
•
Granted: 1962-09-04
•
Expires: 1977-10-10
Abstract
No abstract record available.
Inventors
- 👤 Hugh J Pugsley
- 👤 Warren H Neville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:22
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304725A
Cited
US936930A
Cited
US1102359A
Cited
US1828830A
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US2016458A
Cited
US2025165A
Cited
AT175271B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |