US2417141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binder post
Assignee: Individual
•
Filing: 1943-04-17
•
Granted: 1947-03-11
•
Expires: 1963-04-17
Abstract
No abstract record available.
Inventors
- 👤 William W Syfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:35
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/02; B42F13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US897878A
Cited
US1072867A
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US1126904A
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US1720847A
Cited
US1804134A
Cited
US2009981A
Cited
US1918451A
Cited
US1898609A
Cited
US1997886A
Cited
US2200364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-10 | 1950-09-09 | 1951-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-10 | 1954-09-09 | 1955-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-10 | 1958-09-09 | 1959-03-11 | $7700.00 | Window Closed / Lapsed |