US2660217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing masonry simulating panel
Assignee: Building Products Ltd
•
Filing: 1950-03-02
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Granted: 1953-11-24
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Expires: 1970-03-02
Abstract
No abstract record available.
Inventors
- 👤 William A Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:41
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/14; E04F13/147; B; B28; B28B; B28B1/00; B28B1/52; B28B1/522; B28B11/00; B28B11/04; B44; B44F; B44F11/00; B44F11/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1052; Y10T156/1062; Y10T156/1064
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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |