Patent US4202806A successfully refreshed from Google Patents.
Patent US2895234A successfully refreshed from Google Patents.
US2895234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting frame construction for display board or chalkboard
Assignee: Individual
•
Filing: 1956-06-20
•
Granted: 1959-07-21
•
Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Henry F Rohrman
- 👤 Robert A Butters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:26
CPC Classifications
G; G09; G09F; G09F1/00; G09F1/10; G09F1/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1790549A
Cited
US2064984A
Cited
US2015769A
Cited
US2182481A
Cited
US2319278A
Cited
US2300248A
Cited
US2607971A
Cited
US2469347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |