US2805567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow block wall construction
Assignee: DURISOL A G fur LEICHTBAUSTOFF
•
Filing: 1949-11-02
•
Granted: 1957-09-10
•
Expires: 1969-11-02
Abstract
No abstract record available.
Inventors
- 👤 Schnell August
- 👤 Bosshard Alex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:35
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/26; E04B2002/0202; E04B2002/0204; E04B2002/0206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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US1604097A
Cited
US1758903A
Cited
US1884319A
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US2176986A
Cited
GB538720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |