US3170974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for embossing foamed thermoplastic sheets
Assignee: Sun Chemical Corp
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Filing: 1962-06-06
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Granted: 1965-02-23
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Expires: 1982-06-06
Abstract
No abstract record available.
Inventors
- 👤 William A Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C44/5636; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
METHOD OF EMBOSSING FOAMED THERMOPLASTIC SHEET COMPRISING HEATING BOTH SURFACES OF SAID SHEET TO A TEMPERATURE ABOVE THE HEAT DISTORTION TEMPERATURE THEREOF BUT BELOW THAT TEMPERATURE AT WHICH SAID SHEET IS INCAPABLE OF SUPPORTING ITSELF AGAINST ITS OWN GRAVITY, ONE SAID SURFACE BEING HEATED TO A HIGHER TEMPERATURE THAN THE OTHER SAID SURFACE, AND THEREAFTER PASSING SAID HEATED SHEET INTO THE NIP OF A PAIR OF ROLLS ONE OF WHICH IS SMOOTHFACED AND THE OTHER OF WHICH HAS DEPRESSED PORTIONS ON ITS FACE, THE SURFACE OF SAID SHEET WHICH IS HEATED TO A HIGHER TEMPERATURE BEING IN CONTACT WITH SAID SMOOTHFACED ROLL AND THE OTHER SAID SURFACE OF SAID SHEET BEING
Claim 2
Dependent Claim
111 words
METHOD OF EMBOSSING FOAMED THERMOPLASTIC SHEET COMPRISING HEATING BOTH SURFACES OF SAID SHEET TO A TEMPERATURE ABOVE THE HEAT DISTORTION TEMPERATURE THEREOF BUT BELOW THAT TEMPERATURE AT WHICH SAID SHEET IS INCAPABLE OF SUPPORTING ITSELF AGAINST ITS OWN GRAVITY, ONE SAID SURFACE BEING HEATED TO A HIGHER TEMPERATURE THAN THE OTHER SAID SURFACE, AND THEREAFTER PASSING SAID HEATED SHEET INTO THE NIP OF A PAIR OF ROLLS ONE OF WHICH IS SMOOTHFACED AND THE OTHER OF WHICH HAS DEPRESSED PORTIONS ON ITS FACE, THE SURFACE OF SAID SHEET WHICH IS HEATED TO A HIGHER TEMPERATURE BEING IN CONTACT WITH SAID SMOOTHFACED ROLL AND THE OTHER SAID SURFACE OF SAID SHEET BEING
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |