Patent US1680276A successfully refreshed from Google Patents.
US1680276A
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US
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Oil-refining still
Assignee: AO Smith Corp
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Filing: 1927-10-29
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Granted: 1928-08-14
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Expires: 1947-10-29
Abstract
No abstract record available.
Inventors
- 👤 Orrin E Andrus
- 👤 Hermanson Sune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:19
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/02; B01J2219/00; B01J2219/02; B01J2219/0204; B01J2219/0236; Y; Y10; Y10S; Y10S220/00; Y10S220/29; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10S76/00; Y10S76/04; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12861; Y10T428/12951; Y10T428/12972
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) | 1931-08-14 | 1932-02-13 | 1932-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-14 | 1936-02-13 | 1936-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-14 | 1940-02-13 | 1940-08-14 | $7700.00 | Window Closed / Lapsed |