US1853561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical pencil
Assignee: Individual
•
Filing: 1924-12-18
•
Granted: 1932-04-12
•
Expires: 1944-12-18
Abstract
No abstract record available.
Inventors
- 👤 Paul S Hauton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:44
CPC Classifications
B; B43; B43K; B43K21/00; B43K21/02; B43K21/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-04-12 | 1935-10-12 | 1936-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-12 | 1939-10-12 | 1940-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-12 | 1943-10-12 | 1944-04-12 | $7700.00 | Window Closed / Lapsed |