US2421322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1945-12-11
•
Granted: 1947-05-27
•
Expires: 1965-12-11
Abstract
No abstract record available.
Inventors
- 👤 Frazin Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:01
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/10; B62B1/12; B62B2202/00; B62B2202/22; B62B2202/26; B62B2205/00; B62B2205/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US577432A
Cited
US1242418A
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US1718962A
Cited
US1751902A
Cited
US2313884A
Cited
US2395275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |