Patent US2197462A successfully refreshed from Google Patents.
US2197462A
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Process and product relating to heteropolar compounds
Assignee: Shell Development Co
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Filing: 1937-12-27
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Granted: 1940-04-16
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Expires: 1957-12-27
Abstract
No abstract record available.
Inventors
- 👤 Franklin A Bent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M137/105; C07; C07C; C07C29/00; C07C29/17; C07C29/175; C07C35/00; C07C35/02; C07C35/06; C07C403/00; C07C403/14; C07C403/16; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07C45/68; C07C45/72; C07C45/74; C07C45/78; C07C45/81; C07C45/82; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/144; C07F9/16; C07C2601/00; C07C2601/06; C07C2601/10; C07C2601/12; C07C2601/14; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/047; C10M2223/08; C10N; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/20; C10N2040/22
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) | 1943-04-16 | 1943-10-16 | 1944-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-16 | 1947-10-16 | 1948-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-16 | 1951-10-16 | 1952-04-16 | $7700.00 | Window Closed / Lapsed |