US2602333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace draft automatic release
Assignee: Individual
•
Filing: 1949-05-10
•
Granted: 1952-07-08
•
Expires: 1969-05-10
Abstract
No abstract record available.
Inventors
- 👤 Roy G Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:13
CPC Classifications
F; F23; F23L; F23L3/00; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US339043A
Cited
US1956902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |