Patent US3208868A successfully refreshed from Google Patents.
US3208868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for coating articles with particulate material
Assignee: 3M Co
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Filing: 1961-01-05
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Granted: 1965-09-28
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Expires: 1981-01-05
Abstract
No abstract record available.
Inventors
- 👤 Rupert F Strobel
- 👤 Backlund Sven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:31
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/02; B29C63/04; B29C63/08; B29C63/10; B29C63/105; B05; B05B; B05B13/00; B05B13/02; B05B13/0207; B05B13/0214; B05B5/00; B05B5/08; B05B5/14; B05C; B05C19/00; B05D; B05D1/00; B05D1/02; B05D1/04; B05D1/06; B05D7/00; B05D7/14; B05D7/146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE METHOD OF PROVIDING A METAL PIPE WITH A CONTINUOUS RESINOUS COATNG FORMED FROM DISCRETE SOLID THERMOADHESIVE PARTICLES, COMPRISING THE STEPS OF HEATING THE ARTICLE TO A TEMPERATURE ABOVE THE SOFTENING TEMPERATURE OF SAID SOLID THERMOADESHIVE PARTICLES, FORMING AT LEAST ONE SUBSTNATIALLY CONICAL CENTRIPETAL JET CURTAIN OF AIRBORNE PARTICLES OF SAID SOLID THERMOADHESIVE MATERIAL, PASSING SAID PIPE IN ALIGNED LONGITUDINAL CONDITION ALONG THE MAJOR AXIS OF SAID CONINCAL CENTRIPETAL JET CURTAIN OF SAID PARTICLES AND THROUGH THE CONFLUENCE OF SAID CENTRIPETAL JET CURTAIN WHILE MAINTAINING THE TEMPERATURE OF SAID PIPE ABOVE THE SOFTENING POINT OF SAID PARTICLES AND WHILE SIMULTANEOUSLY EXHAUSTING FROM THE VICINITY OF SAID PIPE THOSE PARTICLES NOT ADHERING TO SAID PIPE, SAID CONDITIONS OF MOVEMENT OF SAID PIPE THROUGH SAID CURTAIN OF PARTICLES BEING SUCH AS TO CAUSE SUFFICENT OF SAID PARTICLES TO ADHERE TO SAID PIPE TO FORM A CONTINUOUS COALESCED RESINOUS COATING THEREON.
Claim 2
Independent Claim
148 words
THE METHOD OF PROVIDING A METAL PIPE WITH A CONTINUOUS RESINOUS COATNG FORMED FROM DISCRETE SOLID THERMOADHESIVE PARTICLES, COMPRISING THE STEPS OF HEATING THE ARTICLE TO A TEMPERATURE ABOVE THE SOFTENING TEMPERATURE OF SAID SOLID THERMOADESHIVE PARTICLES, FORMING AT LEAST ONE SUBSTNATIALLY CONICAL CENTRIPETAL JET CURTAIN OF AIRBORNE PARTICLES OF SAID SOLID THERMOADHESIVE MATERIAL, PASSING SAID PIPE IN ALIGNED LONGITUDINAL CONDITION ALONG THE MAJOR AXIS OF SAID CONINCAL CENTRIPETAL JET CURTAIN OF SAID PARTICLES AND THROUGH THE CONFLUENCE OF SAID CENTRIPETAL JET CURTAIN WHILE MAINTAINING THE TEMPERATURE OF SAID PIPE ABOVE THE SOFTENING POINT OF SAID PARTICLES AND WHILE SIMULTANEOUSLY EXHAUSTING FROM THE VICINITY OF SAID PIPE THOSE PARTICLES NOT ADHERING TO SAID PIPE, SAID CONDITIONS OF MOVEMENT OF SAID PIPE THROUGH SAID CURTAIN OF PARTICLES BEING SUCH AS TO CAUSE SUFFICENT OF SAID PARTICLES TO ADHERE TO SAID PIPE TO FORM A CONTINUOUS COALESCED RESINOUS COATING THEREON.
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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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |