US2697255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing cellular thermoplastic bodies
Assignee: Individual
•
Filing: 1952-01-09
•
Granted: 1954-12-21
•
Expires: 1972-01-09
Abstract
No abstract record available.
Inventors
- 👤 Lindemann Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; C08J9/04; Y; Y10; Y10S; Y10S36/00; Y10S36/02; Y10S521/00; Y10S521/91; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS OF DIMENSIONALLY STABILIZING AND INCREASING THE SPECIFIC GRAVITY OF EXPANDED, GAS-CONTAINING, CLOSED-CELL, CELLULAR BODIES OF NATURAL AND SYNTHETIC ELASTOMERS AND THERMOPLASTIC RESINS, COMPRISING THE STEPS OF SLICING A COMPLETELY EXPANDED, CLOSED CELL, GAS-CONTAINING CELLULAR BODY INTO THIN SLICES OF THE SAME; HEATING SAID THIN SLICES TO A TEMPERATURE ABOVE THE HEAT DISTORTION TEMPERATURE AND BELOW THE SOFTENING POINT OF SAID CELULAR BODY UNTIL A PORTION OF THE GAS CONTAINED IN THE CLOSED CELLS OF SAID CELLULAR BODY DIFFUSES INTO THE SURROUNDING ATMOSPHERE, THEREBY DECREASING THE GAS CONTENT OF SAID CLOSED CELLS AND CAUSING SAID CELLULAR BODY TO CONTRACT, THUS FORMING A DIMENSIONALLY STABLE CLOSEDCELL, CELLULAR BODY HAVING THE SPECIFIC GRAVITY THEREOF INCREASED IN COMPARISON WITH THE SPECIFIC GRAVITY OF THE ORIGINAL CELLULAR BODY.
Claim 2
Dependent Claim
125 words
A PROCESS OF DIMENSIONALLY STABILIZING AND INCREASING THE SPECIFIC GRAVITY OF EXPANDED, GAS-CONTAINING, CLOSED-CELL, CELLULAR BODIES OF NATURAL AND SYNTHETIC ELASTOMERS AND THERMOPLASTIC RESINS, COMPRISING THE STEPS OF SLICING A COMPLETELY EXPANDED, CLOSED CELL, GAS-CONTAINING CELLULAR BODY INTO THIN SLICES OF THE SAME; HEATING SAID THIN SLICES TO A TEMPERATURE ABOVE THE HEAT DISTORTION TEMPERATURE AND BELOW THE SOFTENING POINT OF SAID CELULAR BODY UNTIL A PORTION OF THE GAS CONTAINED IN THE CLOSED CELLS OF SAID CELLULAR BODY DIFFUSES INTO THE SURROUNDING ATMOSPHERE, THEREBY DECREASING THE GAS CONTENT OF SAID CLOSED CELLS AND CAUSING SAID CELLULAR BODY TO CONTRACT, THUS FORMING A DIMENSIONALLY STABLE CLOSEDCELL, CELLULAR BODY HAVING THE SPECIFIC GRAVITY THEREOF INCREASED IN COMPARISON WITH THE SPECIFIC GRAVITY OF THE ORIGINAL CELLULAR BODY.
References Cited (Backward Citations)
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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) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |