US2546335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination louver
Assignee: Individual
•
Filing: 1949-03-28
•
Granted: 1951-03-27
•
Expires: 1969-03-28
Abstract
No abstract record available.
Inventors
- 👤 James R Friend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/32; F; F21; F21S; F21S11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US586248A
Cited
US721258A
Cited
GB190620046A
Cited
GB185914A
Cited
US1747928A
Cited
US2276425A
Cited
US2300545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |