Patent US2920475A successfully refreshed from Google Patents.
US2920475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building panel
Assignee: Individual
•
Filing: 1954-05-05
•
Granted: 1960-01-12
•
Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Graham Phillip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:47
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/20; E04B1/21; E04B1/215; B; B28; B28B; B28B23/00; B28B23/0006; B28B23/005; B28B23/02; E04B1/02; E04B1/04; E04B1/043; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US228052A
Cited
US468990A
Cited
US1447267A
Cited
US882482A
Cited
US1014416A
Cited
US1045519A
Cited
US1086177A
Cited
US1237542A
Cited
US1553157A
Cited
US1737526A
Cited
US1597167A
Cited
US2044101A
Cited
US1863734A
Cited
GB507719A
Cited
US2338246A
Cited
US2431104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |