Patent US2778088A successfully refreshed from Google Patents.
US2778088A
Expired / Lapsed
US
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Manufacture of roofing slabs and the like
Assignee: SOUTHERN ZONOLITE Co
•
Filing: 1950-12-23
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Granted: 1957-01-22
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Expires: 1970-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert W Sterrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:03
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B11/00; B28B11/08; B28B11/0845; B28B15/00; B28B7/00; B28B7/0029
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |