Patent US2752017A successfully refreshed from Google Patents.
US2752017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light diffusing ceiling construction
Assignee: NATIONAL ROLLING MILLS Inc A PA Corp
•
Filing: —
•
Granted: 1956-06-26
•
Expires: 1973-06-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:30
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/30; E04B9/006; E04B9/04; E04B9/06; E04B9/064; E04B9/12; E04B9/127; E04B9/22; E04B9/225; E04B9/24; E04B9/241; E04B9/26; E04B9/32; E04B2009/0492
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2511764A
Cited
GB191017277A
Cited
US1045297A
Cited
US1870241A
Cited
US1962648A
Cited
US2022078A
Cited
US2160638A
Cited
US2293672A
Cited
GB553815A
Cited
US2398507A
Cited
US2527031A
Cited
GB640811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |