Patent AT19773B successfully refreshed from Google Patents.
US2777053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-indirect reversible luminaire
Assignee: Individual
•
Filing: 1953-09-28
•
Granted: 1957-01-08
•
Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Willis L Lipscomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:41
CPC Classifications
F; F21; F21V; F21V11/00; F21V1/00; F21V1/02; F21V1/08; F21V11/02; F21V11/04; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1154505A
Cited
US1513489A
Cited
US1741658A
Cited
GB446328A
Cited
US2667117A
Cited
US2625648A
Cited
US2670430A
Cited
US2714154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |