Patent US2813992A successfully refreshed from Google Patents.
Patent US2932745A successfully refreshed from Google Patents.
US2932745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Standard radiation-resistant building block
Assignee: Individual
•
Filing: 1957-06-06
•
Granted: 1960-04-12
•
Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Alberti Rudolf
- 👤 Gotting Hans
- 👤 Rudolf J L Sigmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:09
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; G; G21; G21C; G21C11/00; G21C11/02; G21C11/028; G21F; G21F3/00; G21F3/04; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |