US2887029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer feed tank apparatus
Assignee: BASF Catalysts UK Holdings Ltd
•
Filing: 1954-04-20
•
Granted: 1959-05-19
•
Expires: 1974-04-20
Abstract
No abstract record available.
Inventors
- 👤 Druce William John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
G; G03; G03D; G03D5/00; G03D5/06; G03D5/067; G03D3/00; G03D3/02; G03D3/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7498
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1916108A
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US1891722A
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US2014744A
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US2172783A
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US2140432A
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US2191850A
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US2168997A
Cited
FR854896A
Cited
US2241104A
Cited
US2605684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |