US2037566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaner for tin, zinc, and aluminum
Assignee: SWANN RES Inc
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Filing: 1932-11-23
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Granted: 1936-04-14
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Expires: 1952-11-23
Abstract
No abstract record available.
Inventors
- 👤 Charles B Durgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:18
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/16; C11; C11D; C11D3/00; C11D3/39; C11D3/3942
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) | 1939-04-14 | 1939-10-14 | 1940-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-14 | 1943-10-14 | 1944-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-14 | 1947-10-14 | 1948-04-14 | $7700.00 | Window Closed / Lapsed |