US3367541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust distributor
Assignee: United States Steel Corp
•
Filing: 1966-04-06
•
Granted: 1968-02-06
•
Expires: 1986-04-06
Abstract
No abstract record available.
Inventors
- 👤 Walter E Cook
- 👤 Harper Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:31
CPC Classifications
E; E21; E21F; E21F5/00; E21F5/08; E21F5/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US928374A
Cited
US1668080A
Cited
US1964345A
Cited
US2441700A
Cited
US2636642A
Cited
US2758564A
Cited
US2965269A
Cited
US2919160A
Cited
US3134513A
Cited
US3121593A
Cited
US3188144A
Cited
US3201000A
Cited
US3254766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |