US3292331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking blocks and wall construction
Assignee: Individual
•
Filing: 1964-01-24
•
Granted: 1966-12-20
•
Expires: 1984-01-24
Abstract
No abstract record available.
Inventors
- 👤 Carl R Sams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:35
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/16; E04B2/18; E04B2/04; E04B2/06; E04B2/10; E04B2002/0202; E04B2002/0243; E04B2002/0252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1154546A
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US1508325A
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US2291712A
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US2558630A
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FR935013A
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US2655032A
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US3112578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |