Patent US2933920A successfully refreshed from Google Patents.
US2933920A
Expired / Lapsed
US
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Building blocks
Assignee: Steuler Industriewerke GmbH
•
Filing: 1957-04-04
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Granted: 1960-04-26
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Expires: 1977-04-04
Abstract
No abstract record available.
Inventors
- 👤 Steuler Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:03
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/28; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/22; E04B2002/0202; E04B2002/0243; E04B2002/0256; E04B2002/0265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US379027A
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US716865A
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US830345A
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US1527874A
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US2351768A
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US2392551A
Cited
FR1017203A
Cited
US2500866A
Cited
US2706322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |