US2981631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed coating method for forming a foam
Assignee: Polymer Corp
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Filing: 1957-11-13
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Granted: 1961-04-25
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Expires: 1977-11-13
Abstract
No abstract record available.
Inventors
- 👤 Fritz J Nagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:17
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20; Y; Y10; Y10S; Y10S264/00; Y10S264/51; Y10S297/00; Y10S297/02; Y10S425/00; Y10S425/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR FORMING A FOAM ON A SUBSTRATE WHICH COMPRISES FLUIDIZING THE MATERIAL TO BE FOAMED IN A DRY PULVERULENT FORM IN A VESSEL; PLACING SAID SUBSTRATE IN SAID VESSEL TO BE CONTACTED BY SAID MATERIAL WHILE SAID SUBSTRATE IS HEATED TO A TEMPERATURE AT LEAST AS HIGH AS THE SOFTENING TEMPERATURE OF SAID MATERIAL; ALLOWING SAID FLUIDIZED MATERIAL TO FLOW AGAINST THE HEATED SUBSTRATE, THEREBY FORMING A SOFTENED MASS OF SAID MATERIAL THEREON; PRODUCING GASEOUS MATERIAL WITHIN THE RESULTANT MELT; AND SETTING THE MELT WITH SAID GASEOUS MATERIAL THEREIN, THEREBY FORMIMG SAID FOAM.
Claim 2
Dependent Claim
95 words
A PROCESS FOR FORMING A FOAM ON A SUBSTRATE WHICH COMPRISES FLUIDIZING THE MATERIAL TO BE FOAMED IN A DRY PULVERULENT FORM IN A VESSEL; PLACING SAID SUBSTRATE IN SAID VESSEL TO BE CONTACTED BY SAID MATERIAL WHILE SAID SUBSTRATE IS HEATED TO A TEMPERATURE AT LEAST AS HIGH AS THE SOFTENING TEMPERATURE OF SAID MATERIAL; ALLOWING SAID FLUIDIZED MATERIAL TO FLOW AGAINST THE HEATED SUBSTRATE, THEREBY FORMING A SOFTENED MASS OF SAID MATERIAL THEREON; PRODUCING GASEOUS MATERIAL WITHIN THE RESULTANT MELT; AND SETTING THE MELT WITH SAID GASEOUS MATERIAL THEREIN, THEREBY FORMIMG SAID FOAM.
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |