US3621815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray gun
Assignee: Graco Inc
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Filing: 1969-08-22
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Granted: 1971-11-23
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Expires: 1989-08-22
Abstract
Abstract WORK IS ELECTROSTATICALLY COATED WITH HIGHLY CONDUCTIVE MATERIAL BY HYDROSTACIS ATOMIZING SPRAY GUNS. THE RATE OF MATERIAL APPLICATION TO WORK FOR WATER BASE MATERIAL SUCH AS PORCELAIN ENAMEL IS HIGH BEING IN EXCESS OF THREE MILS OF FILM THICKNESS IN LESS THAN SIXTY SECONDS TO PREVENT "DRY SPRAY." THE PROBLEM OF "DRY SPRAY" IS FURTHER CONTROLLED BY PLACING THE SPRAY GUNS VERY CLOSE TO THE WORK (LESS THAN TWELVE INCHES).
Inventors
- 👤 Arvid C Walberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:31
CPC Classifications
C; C23; C23D; C23D5/00; C23D5/02; B; B05; B05B; B05B13/00; B05B13/02; B05B13/04; B05B13/0405; B05B13/041; B05B5/00; B05B5/025; B05B5/03; B05B5/08; B05B7/00; B05B7/16; B05B7/1606; B05B7/1613; B05B7/162; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |