US2434973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eraser with magnetic supporting means
Assignee: Individual
•
Filing: 1945-10-01
•
Granted: 1948-01-27
•
Expires: 1965-10-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:54
CPC Classifications
B; B43; B43L; B43L19/00; B43L19/0056; B43L19/0062; Y; Y10; Y10S; Y10S206/00; Y10S206/818; Y10S211/00; Y10S211/01; Y10T; Y10T24/00; Y10T24/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-26 | 1951-07-28 | 1952-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-26 | 1955-07-28 | 1956-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-26 | 1959-07-28 | 1960-01-27 | $7700.00 | Window Closed / Lapsed |