Patent US2607501A successfully refreshed from Google Patents.
US2607501A
Expired / Lapsed
US
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Apparatus for stacking wallboard panels and the like
Assignee: National Gypsum Co
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Filing: 1947-06-25
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Granted: 1952-08-19
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Expires: 1967-06-25
Abstract
No abstract record available.
Inventors
- 👤 Jeffrey Alberta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:26
CPC Classifications
B; B65; B65G; B65G57/00; B65G57/02; B65G57/03; B65G57/04; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/102; Y10S414/103; Y10S414/114
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US983892A
Cited
US2065674A
Cited
US2165918A
Cited
US2228887A
Cited
US2234990A
Cited
US2396090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |