Patent US3456407A successfully refreshed from Google Patents.
US3456407A
Expired / Lapsed
US
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Joining building units
Assignee: COLIN H DAVIDSON
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Filing: 1967-10-19
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Granted: 1969-07-22
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Expires: 1987-10-19
Abstract
No abstract record available.
Inventors
- 👤 Colin H Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:26
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1332030A
Cited
US1723306A
Cited
US1964131A
Cited
US2717514A
Cited
US3068763A
Cited
US3374703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |