US2831232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tongue-and-groove concrete plank molding apparatus
Assignee: LAWSON Manufacturing CORP
•
Filing: 1954-05-19
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Granted: 1958-04-22
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Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 Victor F Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:38
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B7/00; B28B7/0064; B28B7/0079; B28B7/24; B28B7/241; B28B7/243; Y; Y10; Y10S; Y10S425/00; Y10S425/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US824563A
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US870588A
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FR665719A
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US2270541A
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US2560781A
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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) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |