Patent US3020276A successfully refreshed from Google Patents.
US3020276A
Expired / Lapsed
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Cyclic amidines
Assignee: Baker Petrolite LLC
•
Filing: 1958-03-03
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Granted: 1962-02-06
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 William B Hughes
- 👤 Verner L Stromberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:29
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C04; C04B; C04B24/00; C04B24/12; C04B24/128; C07D403/00; C07D403/02; C07D403/12; C09; C09K; C09K8/00; C09K8/60; C09K8/605; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/28; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/063; C23G5/00; C23G5/02; C23G5/028; C23G5/02854; C23G5/02883; C23G5/0289; C10L1/232; C10L1/234; C10L1/238; C10L1/2383; C10L1/2387; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
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US2324287A
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US2468163A
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US2468180A
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US2574537A
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US2953565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |