US2831459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic mechanical pencil feed tube
Assignee: Scripto Inc
•
Filing: 1954-06-15
•
Granted: 1958-04-22
•
Expires: 1974-06-15
Abstract
No abstract record available.
Inventors
- 👤 Blanchard D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:12
CPC Classifications
B; B43; B43K; B43K21/00; B43K21/02; B43K21/08; B29; B29C; B29C45/00; B29C45/03; B29C45/036; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18752
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US4840A
Cited
US1411116A
Cited
US1888613A
Cited
US1944571A
Cited
US2095328A
Cited
US2031786A
Cited
US2265436A
Cited
US2216188A
Cited
US2336423A
Cited
US2520888A
Cited
US2557320A
Cited
US2602191A
Cited
US2722913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |