Patent US3850989A successfully refreshed from Google Patents.
US3850989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2,2-trichloro-4'-tert butyl-acetophenone
Assignee: Akzo NV
•
Filing: 1973-04-03
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Granted: 1974-11-26
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Expires: 1993-04-03
Abstract
Abstract 1. 2,2,2-TRICHLORO-4''-TERT.BUTYLACETOPHENONE.
Inventors
- 👤 R Havinga
- 👤 P Swaters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:44
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08K; C08K5/00; C08K5/04; C08K5/07; C09; C09D; C09D167/00; C09D167/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
2,2,2-TRICHLORO-4''-TERT.BUTYLACETOPHENONE.
Claim 2
Dependent Claim
1 words
2,2,2-TRICHLORO-4''-TERT.BUTYLACETOPHENONE.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |