US2631391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calendar
Assignee: Individual
•
Filing: 1948-05-11
•
Granted: 1953-03-17
•
Expires: 1968-05-11
Abstract
No abstract record available.
Inventors
- 👤 Fred G Hanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:29
CPC Classifications
G; G09; G09D; G09D3/00; G09D3/04; G09D3/06; G09D3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348044A
Cited
US1793260A
Cited
US659572A
Cited
FR413943A
Cited
US1280837A
Cited
US1515718A
Cited
GB326040A
Cited
US1846551A
Cited
US2029209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |