US2490577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking wall tile
Assignee: PITTSBURGH PLASTIC TILE Co
•
Filing: 1947-05-28
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Granted: 1949-12-06
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Expires: 1967-05-28
Abstract
No abstract record available.
Inventors
- 👤 Richard G Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/18; E04F13/0885; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |