Patent US3411969A successfully refreshed from Google Patents.
US3411969A
Expired / Lapsed
US
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Method and apparatus for heat sealing cartons
Assignee: WestRock Minnesota Corp
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Filing: 1965-03-02
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Granted: 1968-11-19
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Expires: 1985-03-02
Abstract
No abstract record available.
Inventors
- 👤 Robert O Ragan
- 👤 Jerome F Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:57
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; H; H01; H01K; H01K3/00; H01K3/02; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1051
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2160221A
Cited
US2843027A
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US2983306A
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US3367819A
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US3282766A
Cited
US3361041A
Cited
US3317114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |