US2521165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pencil sharpener
Assignee: Individual
•
Filing: 1945-01-12
•
Granted: 1950-09-05
•
Expires: 1965-01-12
Abstract
No abstract record available.
Inventors
- 👤 Heath Harry Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:13
CPC Classifications
B; B43; B43L; B43L23/00; B43L23/02; B43L23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305855A
Cited
US839806A
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US1050770A
Cited
US1171350A
Cited
GB156265A
Cited
US1532167A
Cited
US1611141A
Cited
US2146890A
Cited
US2216681A
Cited
US2287247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |