US3086248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing aging period of cellular products formed with steam
Assignee: Armstrong World Industries Inc
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Filing: 1959-12-07
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Granted: 1963-04-23
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Expires: 1979-12-07
Abstract
No abstract record available.
Inventors
- 👤 Charles R Culp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/232; B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C33/00; B29C33/10; B29C44/3415; B29C44/3426; Y; Y10; Y10S; Y10S425/00; Y10S425/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN THE PROCESS FOR THE PRODUCTION OF CELLULAR SHAPED ARTICLES OF SYNTHETIC THERMOPLASTIC RESINS WHICH COMPRISES CHARGING A MOLD HAVING A PERFORATED TOP AND BOTTOM PLATE WITH SMALL PARTICLES OF POROUS SYNTHETIC THERMOPLASTIC RESIN WHICH HAVE BEEN PARTIALLY BUT INCOMPLETELY FOAMED BY MEANS OF HEAT AND HICH PARTICLES CONTAIN LIQUID BLOWING AGENTS IN WHICH THE THERMOPLASTIC RESIN IS INSOLUBLE, SAID LIQUIDS HAVING BOILING POINTS LOWER THAN THE SOFTENING POINT OF SAID RESIN, AND PASSING STEAM THROUGH SAID PERFORATED PLATES OF SAID MOLD UNTIL A STEAM PRESSURE IN THE RANGE OF ABOUT 2-20 POUNDS PER SQUARE INCH GAGE IS ACHIEVED AT THE STEAM INLET OF SAID MOLD AND DISCHARGING SAID PRODUCT FROM SAID MOLD, THE IMPROVEMENT WHICH COMPRISES APPLYING VACUUM TO SAID MOLD ON THE SIDE OPPOSITE FROM THAT IN WHICH STEAM IS ADMITTED TO SAID MOLD DURING THE TIME STEAM IS ADMITTED TO SAID MOLD, CUTTING OFF THE STEAM, AND IMMEDIATELY SUBJECTING THE PRODUCT IN SAID MOLD TO VACUUM IN THE RANGE OF 10-28 INCHES OF MERCURY FOR A PERIOD OF 5-15 MINUTES.
Claim 2
Dependent Claim
173 words
IN THE PROCESS FOR THE PRODUCTION OF CELLULAR SHAPED ARTICLES OF SYNTHETIC THERMOPLASTIC RESINS WHICH COMPRISES CHARGING A MOLD HAVING A PERFORATED TOP AND BOTTOM PLATE WITH SMALL PARTICLES OF POROUS SYNTHETIC THERMOPLASTIC RESIN WHICH HAVE BEEN PARTIALLY BUT INCOMPLETELY FOAMED BY MEANS OF HEAT AND HICH PARTICLES CONTAIN LIQUID BLOWING AGENTS IN WHICH THE THERMOPLASTIC RESIN IS INSOLUBLE, SAID LIQUIDS HAVING BOILING POINTS LOWER THAN THE SOFTENING POINT OF SAID RESIN, AND PASSING STEAM THROUGH SAID PERFORATED PLATES OF SAID MOLD UNTIL A STEAM PRESSURE IN THE RANGE OF ABOUT 2-20 POUNDS PER SQUARE INCH GAGE IS ACHIEVED AT THE STEAM INLET OF SAID MOLD AND DISCHARGING SAID PRODUCT FROM SAID MOLD, THE IMPROVEMENT WHICH COMPRISES APPLYING VACUUM TO SAID MOLD ON THE SIDE OPPOSITE FROM THAT IN WHICH STEAM IS ADMITTED TO SAID MOLD DURING THE TIME STEAM IS ADMITTED TO SAID MOLD, CUTTING OFF THE STEAM, AND IMMEDIATELY SUBJECTING THE PRODUCT IN SAID MOLD TO VACUUM IN THE RANGE OF 10-28 INCHES OF MERCURY FOR A PERIOD OF 5-15 MINUTES.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |