Patent US2933207A successfully refreshed from Google Patents.
US2933207A
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Unit stacking apparatus
Assignee: STRUCTURAL CLAY PRODUCTS RES F
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Filing: 1957-06-19
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Granted: 1960-04-19
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Expires: 1977-06-19
Abstract
No abstract record available.
Inventors
- 👤 Harvey A Edmonds
- 👤 Clifford E Evanson
- 👤 William S Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
B; B65; B65B; B65B35/00; B65B35/30; B65B35/50; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1632203A
Cited
US1673014A
Cited
US2591259A
Cited
US2613824A
Cited
US2648181A
Cited
US2790531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |