US2490612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barrier for doorways or the like
Assignee: Individual
•
Filing: 1945-08-22
•
Granted: 1949-12-06
•
Expires: 1965-08-22
Abstract
No abstract record available.
Inventors
- 👤 Louie W Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B2009/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US141677A
Cited
US1225550A
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US1554421A
Cited
US1608785A
Cited
US1620976A
Cited
US1660227A
Cited
US1782173A
Cited
US2109160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |