Patent US1688523A successfully refreshed from Google Patents.
US1688523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall structure and method of building the same
Assignee: Individual
•
Filing: 1925-07-30
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Granted: 1928-10-23
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Expires: 1945-07-30
Abstract
No abstract record available.
Inventors
- 👤 Chown Charles Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:11
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/84; E04B2/86; E04B2/8647; E04B2/8635; E04B2002/867; E04B2002/8688
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) | 1931-10-23 | 1932-04-23 | 1932-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-23 | 1936-04-23 | 1936-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-23 | 1940-04-23 | 1940-10-23 | $7700.00 | Window Closed / Lapsed |