US2490759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning scale
Assignee: Rosenblad Corp
•
Filing: 1943-10-06
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Granted: 1949-12-06
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Expires: 1963-10-06
Abstract
No abstract record available.
Inventors
- 👤 Tyden Arnold Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
F; F28; F28G; F28G9/00; B; B01; B01D; B01D1/00; B01D1/06; B01D1/065; C; C02; C02F; C02F5/00; C02F5/08; C23; C23G; C23G1/00; D; D21; D21C; D21C11/00; D21C11/10; D21C11/106; Y; Y10; Y10S; Y10S159/00; Y10S159/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1326280A
Cited
US1006197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |