Patent US3523916A successfully refreshed from Google Patents.
US3523916A
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Additive dispersant
Assignee: Phillips Petroleum Co
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Filing: 1967-01-26
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Granted: 1970-08-11
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Expires: 1987-01-26
Abstract
No abstract record available.
Inventors
- 👤 Donald G Needham
- 👤 George R Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:32
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J3/00; C08J3/20; C08J3/203; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/0008; C08K5/0041; C08K5/04; C08K5/10; C08K5/16; C08K5/20; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/18; C08L23/20; C08L27/00; C08L27/02; C08L27/04; C08L27/08; C08J2423/00; C08L23/22; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |