Patent US2887869A successfully refreshed from Google Patents.
US2887869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building block and beam and wall structures of same
Assignee: RAY FERWERDA AND KOOP FERWERDA
•
Filing: 1953-05-28
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Granted: 1959-05-26
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Expires: 1973-05-28
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:31
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/26; E04B2/16; E04B2002/0202; E04B2002/0204; E04B2002/0208
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) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |