Patent US2469347A successfully refreshed from Google Patents.
US2469347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary chalk and eraser holder
Assignee: American Seating Co
•
Filing: 1948-12-16
•
Granted: 1949-05-03
•
Expires: 1968-12-16
Abstract
No abstract record available.
Inventors
- 👤 Windhorst Pearl Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
A; A47; A47B; A47B97/00; A47B97/04; B; B43; B43L; B43L21/00; B43L21/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US883402A
Cited
US1279554A
Cited
US1352720A
Cited
US1617449A
Cited
US1984845A
Cited
US2338146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |