Patent US3539692A successfully refreshed from Google Patents.
US3539692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace hood
Assignee: Fuller Co
•
Filing: 1969-06-24
•
Granted: 1970-11-10
•
Expires: 1989-06-24
Abstract
No abstract record available.
Inventors
- 👤 John M Heeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:55
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; F27D17/304; F27B; F27B3/00; F27B3/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2935927A
Cited
US2932679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |