Patent US3418774A successfully refreshed from Google Patents.
US3418774A
Expired / Lapsed
US
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Building block and wall made therefrom
Assignee: ALFRED LAWRENCE KOCHER
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Filing: 1967-01-06
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Granted: 1968-12-31
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Expires: 1987-01-06
Abstract
No abstract record available.
Inventors
- 👤 Kocher Alfred Lawrence
- 👤 Ernest A Wiedemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:54
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/22
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |