US2421787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic coating method
Assignee: Harper J Ransburg Co Inc
•
Filing: 1945-01-26
•
Granted: 1947-06-10
•
Expires: 1965-01-26
Abstract
No abstract record available.
Inventors
- 👤 Richard E Helmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/08; B05B5/14; B05B5/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1788600A
Cited
US2217444A
Cited
US2247963A
Cited
US2270341A
Cited
US2287837A
Cited
US2358227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-09 | 1950-12-09 | 1951-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-09 | 1954-12-09 | 1955-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-09 | 1958-12-09 | 1959-06-10 | $7700.00 | Window Closed / Lapsed |