US3544609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc complexes
Assignee: BP PLC
•
Filing: 1967-11-07
•
Granted: 1970-12-01
•
Expires: 1987-11-07
Abstract
No abstract record available.
Inventors
- 👤 Eric Simon Forbes
- 👤 Howard Bernard Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:15
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F3/00; C07F3/003; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/142; C10M2207/16; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/06; C10M2215/24; C10M2215/26; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2492939A
Cited
US2819233A
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US3087950A
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US3351647A
Cited
US3305330A
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US3354189A
Cited
US3367869A
Cited
US3439011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |