Patent US2651969A successfully refreshed from Google Patents.
US925283A
Expired / Lapsed
US
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Method for preventing the formation of boiler-scale.
Assignee: Individual
•
Filing: 1908-08-10
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Granted: 1909-06-15
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Expires: 1928-08-10
Abstract
No abstract record available.
Inventors
- 👤 Theodore Brazda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/025; Y; Y10; Y10S; Y10S159/00; Y10S159/13
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) | 1912-06-14 | 1912-12-14 | 1913-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-06-14 | 1916-12-14 | 1917-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-06-14 | 1920-12-14 | 1921-06-15 | $7700.00 | Window Closed / Lapsed |