US1874759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic means for the protection of boilers
Assignee: ELECTRO ANTI CORROSION CORP
•
Filing: 1930-05-03
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Granted: 1932-08-30
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Expires: 1950-05-03
Abstract
No abstract record available.
Inventors
- 👤 Kirkaldy Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:02
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/4602; C02F1/461; C02F1/46104; C02F1/46109; C02F2201/00; C02F2201/002; C02F2303/00; C02F2303/22
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) | 1935-08-30 | 1936-02-29 | 1936-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-30 | 1940-02-29 | 1940-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-30 | 1944-02-29 | 1944-08-30 | $7700.00 | Window Closed / Lapsed |