Patent US2761640A successfully refreshed from Google Patents.
US2761640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable chalkboard mounting
Assignee: Individual
•
Filing: 1952-01-18
•
Granted: 1956-09-04
•
Expires: 1972-01-18
Abstract
No abstract record available.
Inventors
- 👤 Julius T Frater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:50
CPC Classifications
A; A47; A47B; A47B97/00; A47B97/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US123457A
Cited
US604422A
Cited
GB189708659A
Cited
US689539A
Cited
US728653A
Cited
US861142A
Cited
US1504523A
Cited
US1702937A
Cited
US1912096A
Cited
GB588686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |