Patent US3848815A successfully refreshed from Google Patents.
Patent US1982518A successfully refreshed from Google Patents.
US1982518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scale prevention
Assignee: Individual
•
Filing: 1933-02-24
•
Granted: 1934-11-27
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Expires: 1953-02-24
Abstract
No abstract record available.
Inventors
- 👤 Howard Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:24
CPC Classifications
F; F28; F28G; F28G9/00; Y; Y10; Y10S; Y10S159/00; Y10S159/13; Y10T; Y10T29/00; Y10T29/45; Y10T29/4506; Y10T29/4511; Y10T29/4533; Y10T29/4544
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) | 1937-11-26 | 1938-05-28 | 1938-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-26 | 1942-05-28 | 1942-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-26 | 1946-05-28 | 1946-11-27 | $7700.00 | Window Closed / Lapsed |