US2920409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calendar mount
Assignee: Winthrop Atkins Co Inc
•
Filing: 1958-06-05
•
Granted: 1960-01-12
•
Expires: 1978-06-05
Abstract
No abstract record available.
Inventors
- 👤 George H Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:30
CPC Classifications
G; G09; G09F; G09F1/00; G09F1/10; G09F1/14; A; A47; A47G; A47G1/00; A47G1/14; A47G1/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1705116A
Cited
US2407592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |