Patent US3378888A successfully refreshed from Google Patents.
US3378888A
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Structure for vacuum forming of thermoplastic material on undercut flexible molds
Assignee: Holley Plastics Co
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Filing: 1965-10-19
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Granted: 1968-04-23
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Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 Duane W Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:08
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/34; Y; Y10; Y10S; Y10S425/00; Y10S425/044; Y10S425/058
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2614310A
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US2596028A
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US2714226A
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US2907070A
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US3123863A
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US3290418A
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US3166615A
Cited
US3104425A
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US3157934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |