US2420709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking mold
Assignee: Individual
•
Filing: 1943-04-21
•
Granted: 1947-05-20
•
Expires: 1963-04-21
Abstract
No abstract record available.
Inventors
- 👤 Karl J Kopplin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:32
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/64; B29C45/641; B29C45/70; B29C2045/1784; B29C2045/1787
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1375660A
Cited
US1674387A
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US1566256A
Cited
US1916495A
Cited
US1919534A
Cited
US1888613A
Cited
US1981580A
Cited
US2319479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |