US2442964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for cylindrical openings
Assignee: Individual
•
Filing: 1945-08-10
•
Granted: 1948-06-08
•
Expires: 1965-08-10
Abstract
No abstract record available.
Inventors
- 👤 Charles W Simonsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:35
CPC Classifications
F; F16; F16N; F16N21/00; F16N21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US238790A
Cited
US929974A
Cited
US1161203A
Cited
US1276363A
Cited
US2089609A
Cited
US2273186A
Cited
US2296710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |