Patent US2981997A successfully refreshed from Google Patents.
US2981997A
Expired / Lapsed
US
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Flagstone mold
Assignee: Lord Manufacturing Co
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Filing: 1959-01-26
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Granted: 1961-05-02
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Painter Giles Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:38
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/50; E01C19/508; B; B28; B28B; B28B7/00; B28B7/02; B28B7/06; B28B7/34; B28B7/348; Y; Y10; Y10S; Y10S425/00; Y10S425/044; Y10S425/124; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |