US2977460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting unit
Assignee: Holophane Corp
•
Filing: 1957-06-12
•
Granted: 1961-03-28
•
Expires: 1977-06-12
Abstract
No abstract record available.
Inventors
- 👤 Franck Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:02
CPC Classifications
F; F21; F21V; F21V5/00; E; E04; E04B; E04B9/00; E04B9/06; E04B9/064; E04B9/18; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1843201A
Cited
US1955601A
Cited
US2242872A
Cited
US2294624A
Cited
US2259151A
Cited
US2259152A
Cited
US2756325A
Cited
US2772742A
Cited
US2839671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |