US2231498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mortarless masonry
Assignee: OESTERREICHISCHE MAGNESIT AG
•
Filing: 1939-02-27
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Granted: 1941-02-11
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Expires: 1959-02-27
Abstract
No abstract record available.
Inventors
- 👤 Geistler Wilfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:35
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/16; F27D1/1621; E; E04; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2/06; E04B2/10; F27D1/0003; F27D1/0023; F27D1/0026
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) | 1944-02-11 | 1944-08-12 | 1945-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-11 | 1948-08-12 | 1949-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-11 | 1952-08-12 | 1953-02-11 | $7700.00 | Window Closed / Lapsed |