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US2366780A
Expired / Lapsed
US
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Method for making building blocks
Assignee: Individual
•
Filing: 1941-08-21
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Granted: 1945-01-09
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Expires: 1961-08-21
Abstract
No abstract record available.
Inventors
- 👤 Gelbman Louis
- 👤 Eugene F Olsen
- 👤 Arthur B Mays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:03
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/04; B28B1/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-01-09 | 1948-07-10 | 1949-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-01-09 | 1952-07-10 | 1953-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-01-09 | 1956-07-10 | 1957-01-09 | $7700.00 | Window Closed / Lapsed |