Patent US3374589A successfully refreshed from Google Patents.
US3374589A
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US
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Course spacer and mortar barrier
Assignee: FRED NEAL JR
•
Filing: 1965-10-12
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Granted: 1968-03-26
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Expires: 1985-10-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:06
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/14; E04G21/16; E04G21/18; E04G21/1841; E04G21/1883; E04G21/22; E04B; E04B2/00; E04B2/02; E04B2002/0256; E04B2002/028; E04B2002/0282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1331834A
Cited
US1703095A
Cited
US1788248A
Cited
US2027133A
Cited
US2057462A
Cited
US2483560A
Cited
US2669116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |