Patent US3171749A successfully refreshed from Google Patents.
US3171749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of packaging food
Assignee: WR Grace and Co
•
Filing: 1961-08-30
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Granted: 1965-03-02
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Expires: 1981-08-30
Abstract
No abstract record available.
Inventors
- 👤 Robert L Dreyfus
- 👤 John W Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:59
CPC Classifications
B; B65; B65B; B65B19/00; B65B19/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2789407A
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US2911305A
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US2877500A
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US2815624A
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US2908576A
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US2987402A
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US3006527A
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US3099567A
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US3092246A
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US3106050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |