Patent US4005543A successfully refreshed from Google Patents.
Patent US2306419A successfully refreshed from Google Patents.
US2306419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Darning ball
Assignee: Individual
•
Filing: 1940-03-20
•
Granted: 1942-12-29
•
Expires: 1960-03-20
Abstract
No abstract record available.
Inventors
- 👤 Marie H Worth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:02
CPC Classifications
D; D05; D05B; D05B91/00; D05B91/06; D05B91/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1945-12-28 | 1946-06-29 | 1946-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-28 | 1950-06-29 | 1950-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-28 | 1954-06-29 | 1954-12-29 | $7700.00 | Window Closed / Lapsed |