US2639713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filler block for loose-leaf binders
Assignee: Individual
•
Filing: 1951-08-18
•
Granted: 1953-05-26
•
Expires: 1971-08-18
Abstract
No abstract record available.
Inventors
- 👤 Mckowen William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:58
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/40; B42F13/408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999332A
Cited
US801208A
Cited
US962868A
Cited
US1915140A
Cited
US2184823A
Cited
US2486329A
Cited
US2505694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |