Patent US3416984A successfully refreshed from Google Patents.
US3416984A
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Method and apparatus for making cellular material from thermoplastic sheets
Assignee: Sealed Air Corp
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Filing: 1967-11-13
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Granted: 1968-12-17
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Marc A Chavannes
- 👤 Alfred W Fielding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/30; B29C43/305; B29C43/32; B29C43/44; B29C43/46; B29C51/00; B29C51/18; B29C51/20; B29C51/22; B29C51/225; B32; B32B; B32B27/00; B29C43/36; B29C43/3642; B29C2043/3644; B29C2043/461; B29C2043/463; B29C2043/465; B29C43/58; B29C2043/5816; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1737; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24661
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |