Patent US3260781A successfully refreshed from Google Patents.
US3260781A
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Process for thermoforming a shrinkresistant foamed polystyrene cup
Assignee: Haveg Industries Inc
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Filing: 1963-07-02
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Granted: 1966-07-12
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Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 John H Lux
- 👤 James R Tiffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:24
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/002; B29C51/14; B29C51/26; B29C51/30; B29C51/32; B29C51/325; B32; B32B; B32B27/00; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/265; B29K; B29K2025/00; B29K2105/00; B29K2105/04; B29K2995/00; B29K2995/0012; B29K2995/0017; B29L; B29L2009/00; B29L2031/00; B29L2031/712; B29L2031/7132; Y; Y10; Y10S; Y10S264/00; Y10S264/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN THE PROCESS OF THERMOFORMING A CONTAINER FOR HOT LIQUIDS FROM A SHEET OF A FORAMED STYRENE POLYMER, SAID POLYMER HAVING SOFTENING POINT BELOW 90*C., SAID PROCESS INCLUDING THE STEP OF THERMOFORMING BY STRETCHING THE FOAMED STYRENE POLYMER TO FORM A CONTAINER SIDE WALL, THE IMPROVEMENT COMPRISING CARRYING OUT THE STRETCHING STEP AT A TEMPERATURE OF AT LEAST 96*C. AND BELOW THE TEMPERATURE AT WHICH THE FOAMED CORE IS DESTROYED AND ALSO BELOW THE TEMPERATURE AT WHICH THE STYRENE POLYMER
Claim 2
Dependent Claim
80 words
IN THE PROCESS OF THERMOFORMING A CONTAINER FOR HOT LIQUIDS FROM A SHEET OF A FORAMED STYRENE POLYMER, SAID POLYMER HAVING SOFTENING POINT BELOW 90*C., SAID PROCESS INCLUDING THE STEP OF THERMOFORMING BY STRETCHING THE FOAMED STYRENE POLYMER TO FORM A CONTAINER SIDE WALL, THE IMPROVEMENT COMPRISING CARRYING OUT THE STRETCHING STEP AT A TEMPERATURE OF AT LEAST 96*C. AND BELOW THE TEMPERATURE AT WHICH THE FOAMED CORE IS DESTROYED AND ALSO BELOW THE TEMPERATURE AT WHICH THE STYRENE POLYMER
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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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |