Patent US6107059A successfully refreshed from Google Patents.
US2956150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminous ceiling construction
Assignee: Individual
•
Filing: 1956-11-29
•
Granted: 1960-10-11
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Expires: 1976-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robert A D Schwartz
- 👤 Stephen W Lindheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/34; E04B9/345; E04B9/32; F; F21; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |