US2862439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louvers
Assignee: Individual
•
Filing: 1955-08-11
•
Granted: 1958-12-02
•
Expires: 1975-08-11
Abstract
No abstract record available.
Inventors
- 👤 Arbetman Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:49
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US173789A
Cited
US812158A
Cited
US978129A
Cited
CH63498A
Cited
US1118365A
Cited
US1672655A
Cited
US1912264A
Cited
US2013385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |