US2520658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of galvanizing cylindrical tanks
Assignee: Rheem Manufacturing Co
•
Filing: 1948-01-05
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Granted: 1950-08-29
•
Expires: 1968-01-05
Abstract
No abstract record available.
Inventors
- 👤 Richard S Rheem
- 👤 Robert D Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/06
Claims Analysis
Total Claims: 0
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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) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |