Patent US5272716A successfully refreshed from Google Patents.
US2695425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sintered nylon articles and resultant product
Assignee: Polymer Corp
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Filing: 1952-02-23
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Granted: 1954-11-30
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Expires: 1972-02-23
Abstract
No abstract record available.
Inventors
- 👤 Louis L Stott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:08
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/04; B29C; B29C43/00; B29C43/006; B29C67/00; B29C67/02; B29C67/04; B29K; B29K2077/00; B29K2105/00; B29K2105/06; B29K2105/16; B29K2105/25; B29K2105/251; B29K2705/00; B29K2705/08; B29K2705/10; B29K2705/12; B29K2709/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/61; Y10S264/62; Y10S277/00; Y10S277/924; Y10S277/935; Y10S277/944; Y10S384/00; Y10S384/90; Y10S384/902; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/4971
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD OF FORMING A SHAPED POLYAMIDE ARTICLE WHICH COMPRISES THE STEPS OF COLD COMPRESSING PARTICLES OF HIGH MOLECULAR WEIGHT SYNTHETIC LINEAR POLYAMIDE TO A PREDETERMINED SHAPE IN A MOLD TO FORM A GREEN ARTICLE, REMOVING SAID ARTICLE FROM THE MOLD AND SINTERING, SAID COMPRESSING STEP BEING CARRIED OUT AT A TEMPERATURE BELOW THAT WHICH WILL INDUCE ANY MOLTEN PHASE AND WITH SUFFICIENT PRESSURE TO ALLOW THE SHAPED ARTICLE TO BE HANDLED, THE ULTIMATE SIZE OF SAID POLYAMIDE PARTICLES HAVING AN AVERAGE DIAMETER OF LESS THAN 40 MICRONS, SAID SINTERING CONSISTING OF HEATING SAID SHAPED ARTICLE UNDER SUBSTANTIALLY OXYGEN FREE CONDITIONS BELOW THE TEMPERATURE WHERE ANY SUBSTANTIAL MOLTEN PHASE IS INDUCED AND ABOVE THE TEMPERATURE WHERE THE INFLECTION POINT OCCURS.
Claim 2
Independent Claim
120 words
A METHOD OF FORMING A SHAPED POLYAMIDE ARTICLE WHICH COMPRISES THE STEPS OF COLD COMPRESSING PARTICLES OF HIGH MOLECULAR WEIGHT SYNTHETIC LINEAR POLYAMIDE TO A PREDETERMINED SHAPE IN A MOLD TO FORM A GREEN ARTICLE, REMOVING SAID ARTICLE FROM THE MOLD AND SINTERING, SAID COMPRESSING STEP BEING CARRIED OUT AT A TEMPERATURE BELOW THAT WHICH WILL INDUCE ANY MOLTEN PHASE AND WITH SUFFICIENT PRESSURE TO ALLOW THE SHAPED ARTICLE TO BE HANDLED, THE ULTIMATE SIZE OF SAID POLYAMIDE PARTICLES HAVING AN AVERAGE DIAMETER OF LESS THAN 40 MICRONS, SAID SINTERING CONSISTING OF HEATING SAID SHAPED ARTICLE UNDER SUBSTANTIALLY OXYGEN FREE CONDITIONS BELOW THE TEMPERATURE WHERE ANY SUBSTANTIAL MOLTEN PHASE IS INDUCED AND ABOVE THE TEMPERATURE WHERE THE INFLECTION POINT OCCURS.
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) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |