Patent US3400672A successfully refreshed from Google Patents.
US3400672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace roof hangers for refractory brick
Assignee: Babcock and Wilcox Co
•
Filing: 1966-05-19
•
Granted: 1968-09-10
•
Expires: 1986-05-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Dickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:19
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/14; F27D1/145; F27D1/147; F27D1/148; F23; F23M; F23M5/00; F23M5/06; F27D1/02; F27D1/021; Y; Y10; Y10S; Y10S411/00; Y10S411/921
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |