US3147137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic spraying of polyurethane foam
Assignee: Dow Chemical Co
•
Filing: 1960-10-31
•
Granted: 1964-09-01
•
Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 John Y Glass
- 👤 James L Amos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:32
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/02; B05B3/10; B05B3/1057; B05B12/00; B05B12/14; B05B12/1418; B05B5/00; B05B5/025; B05B5/04; B05B5/08; B05B7/00; B05B7/24; B05B7/2486; B05B7/26; B05B7/28; B05B7/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD FOR UNIFORMLY AND ECONOMICALLY COATING A POLYMERIC RESINOUS ARTICLE WITH A POLYURETHANE FOAM COMPRISING PLACING THE ARTICLE TO BE COATED ON A SUPPORT WITHIN THE OPERATING RANGE OF A ROTATING DISC SPRAY MEANS. ELECTRICALLY GROUNDING THE SUPPORT FOR SAID ARTICLE, APPLYING A HIGH VOLTAGE ELECTROSTATIC CHARGE TO SAID SPRAY MEANS, SUPPLYING A CATALYZED PREPOLYMR ADDUCT WHICH WILL REACT WITH A CROSSLINKER TO FORM SAID POLYURETHANE FOAM TO THE CENTER OF SID DISC SPRAY MEANS, SIMULTANEOUSLY BUT SEPARATELY SUPPLYING SAID CROSSLINKER AND A FOAM AGENT TO FORM SAID POLYURETHANE FOAM TO THE CENTER OF SAID SPRAY MEANS WHEREBY SAID ADDUCT AND SAID CROSSLINKER ARE OPTIMALLY MIXED AND SPRAYED OUTWARDLY UPON SAID ARTICLE AS FINE SPRAY PARTICLES, EACH PARTICLE HAVING SAID HIGH VOTAGE ELECTROSTATIC CHARGE, WHEREBY MAXIMUM UTILIZATION OF SAID ADDUCT AND CROSSLINKER IS ATTAINED AND A UNIFORM SMOOTH-FACED COATING IS FORMED ON SAID ARTICLE.
Claim 2
Independent Claim
145 words
A METHOD FOR UNIFORMLY AND ECONOMICALLY COATING A POLYMERIC RESINOUS ARTICLE WITH A POLYURETHANE FOAM COMPRISING PLACING THE ARTICLE TO BE COATED ON A SUPPORT WITHIN THE OPERATING RANGE OF A ROTATING DISC SPRAY MEANS. ELECTRICALLY GROUNDING THE SUPPORT FOR SAID ARTICLE, APPLYING A HIGH VOLTAGE ELECTROSTATIC CHARGE TO SAID SPRAY MEANS, SUPPLYING A CATALYZED PREPOLYMR ADDUCT WHICH WILL REACT WITH A CROSSLINKER TO FORM SAID POLYURETHANE FOAM TO THE CENTER OF SID DISC SPRAY MEANS, SIMULTANEOUSLY BUT SEPARATELY SUPPLYING SAID CROSSLINKER AND A FOAM AGENT TO FORM SAID POLYURETHANE FOAM TO THE CENTER OF SAID SPRAY MEANS WHEREBY SAID ADDUCT AND SAID CROSSLINKER ARE OPTIMALLY MIXED AND SPRAYED OUTWARDLY UPON SAID ARTICLE AS FINE SPRAY PARTICLES, EACH PARTICLE HAVING SAID HIGH VOTAGE ELECTROSTATIC CHARGE, WHEREBY MAXIMUM UTILIZATION OF SAID ADDUCT AND CROSSLINKER IS ATTAINED AND A UNIFORM SMOOTH-FACED COATING IS FORMED ON SAID ARTICLE.
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |