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Patent US3521808A successfully refreshed from Google Patents.
US3521808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tray for frangible materials
Assignee: PANTASOTE CO OF NEW YORK Inc
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Filing: 1968-07-26
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Granted: 1970-07-28
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Expires: 1988-07-26
Abstract
No abstract record available.
Inventors
- 👤 Hugh R Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/34; B65D1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE637823A
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CH290547A
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US3067921A
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CH386922A
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US3140807A
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US3463378A
Cited
US3403834A
Cited
US3408234A
Cited
US3443715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |