Patent US3329821A successfully refreshed from Google Patents.
US3225126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable bead molding
Assignee: Tempo Plastic Co Inc
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Filing: 1963-05-06
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Granted: 1965-12-21
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Expires: 1983-05-06
Abstract
No abstract record available.
Inventors
- 👤 Roy G Bridges
- 👤 Robert N Aleson
- 👤 Douglas B Hutchings
- 👤 Ralph E Whited
- 👤 Miron L Dyrness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C44/3415; B29C44/3426; B29L; B29L2031/00; B29L2031/712; B29L2031/7132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF FORMING A CUP WITH PRE-EXPANDED POLYSTYRENE BEADS IN A CUP MOLD CAVITY, THE METHOD CONSISTING OF THE STEPS OF PREHEATING THE MOLD CAVITY, INJECTING THE PRE-EXPANDED BEADS INTO THE PRE-HEATED CAVITY, CONCURRENTLY AND COEXTENSIVELY APPLYING HEAT TO THE MOLD FROM A FIRST SOURCE AND APPLYING STEAM AT SUBSTANTIALLY THE SAME TEMPERATURE AS ISS THE AVERAGE TEMPERATURE TO WHICH THE MOLD CAVITY IS PREHEATED TO THE MOLD CAVITY FROM A SECOND SOURCE, SO AS TO CAUSE THE BEADS TO EXPAND AND FILL THE MOLD CAVITY, AND REMOVING THE FORMED CUP FROM THE MOLD CAVITY.
Claim 2
Independent Claim
96 words
THE METHOD OF FORMING A CUP WITH PRE-EXPANDED POLYSTYRENE BEADS IN A CUP MOLD CAVITY, THE METHOD CONSISTING OF THE STEPS OF PREHEATING THE MOLD CAVITY, INJECTING THE PRE-EXPANDED BEADS INTO THE PRE-HEATED CAVITY, CONCURRENTLY AND COEXTENSIVELY APPLYING HEAT TO THE MOLD FROM A FIRST SOURCE AND APPLYING STEAM AT SUBSTANTIALLY THE SAME TEMPERATURE AS ISS THE AVERAGE TEMPERATURE TO WHICH THE MOLD CAVITY IS PREHEATED TO THE MOLD CAVITY FROM A SECOND SOURCE, SO AS TO CAUSE THE BEADS TO EXPAND AND FILL THE MOLD CAVITY, AND REMOVING THE FORMED CUP FROM THE MOLD CAVITY.
References Cited (Backward Citations)
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US2954589A
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US2951260A
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US3125780A
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US3069725A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |