US3238680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall and corner with grouted interlocked blocks
Assignee: Individual
•
Filing: 1962-10-02
•
Granted: 1966-03-08
•
Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph N Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:51
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/26; E04B2002/0202; E04B2002/0204; E04B2002/021; E04B2002/0215
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR973932A
Cited
NL76970C
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US789820A
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US960217A
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US1153900A
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US1434378A
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US1566228A
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US1723930A
Cited
DE575796C
Cited
US2014576A
Cited
US2249204A
Cited
US2414628A
Cited
FR953954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |