US3137973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed-joint construction for masonry block walls
Assignee: Individual
•
Filing: 1960-06-10
•
Granted: 1964-06-23
•
Expires: 1980-06-10
Abstract
No abstract record available.
Inventors
- 👤 Gladys M Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:03
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA495853A
Cited
US1723306A
Cited
US1877729A
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US1958011A
Cited
US2066005A
Cited
US2708016A
Cited
US3099110A
Cited
US2996845A
Cited
US3035375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |