US3260781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for thermoforming a shrinkresistant foamed polystyrene cup
Assignee: Haveg Industries Inc
•
Filing: 1963-07-02
•
Granted: 1966-07-12
•
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
2026-10-26 08:01
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
References Cited (Backward Citations)
CA582122A
Cited
US2384387A
Cited
US2667423A
Cited
US2667422A
Cited
US2764436A
Cited
US2942301A
Cited
US2953814A
Cited
US3019488A
Cited
US2893877A
Cited
GB854586A
Cited
US3045286A
Cited
US3105270A
Cited
US3011212A
Cited
US3039911A
Cited
GB903986A
Cited
US3042972A
Cited
US3137747A
Cited
US3168207A
Cited
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 |