Patent US2502435A successfully refreshed from Google Patents.
US2502435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead pencil holder
Assignee: Individual
•
Filing: 1944-08-02
•
Granted: 1950-04-04
•
Expires: 1964-08-02
Abstract
No abstract record available.
Inventors
- 👤 Earl W Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
B; B43; B43K; B43K23/00; B43K23/06; Y; Y10; Y10T; Y10T403/00; Y10T403/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US132174A
Cited
US407509A
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US468744A
Cited
US667968A
Cited
US940797A
Cited
US1111501A
Cited
US1212020A
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US1283860A
Cited
US1427711A
Cited
US1936213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |