US3196185A
Expired / Lapsed
US
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Tris (hydroxyaryl) alkane compounds and processes for their preparation
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1960-07-22
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Granted: 1965-07-20
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Expires: 1980-07-22
Abstract
No abstract record available.
Inventors
- 👤 Ranson Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:07
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035; C07; C07C; C07C39/00; C07C39/12; C07C39/15; C07C39/16; C07C39/17; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08L; C08L67/00; C08L67/02; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/183; C10L1/1835; C10M; C10M1/00; C10M1/08; C07C2601/00; C07C2601/12; C07C2601/14; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; Y; Y10; Y10S; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
TRIS (HYDROXYPHENYL) PROPANE COMPOUNDS OF THE STRUCTURE:
Claim 2
Dependent Claim
7 words
TRIS (HYDROXYPHENYL) PROPANE COMPOUNDS OF THE STRUCTURE:
References Cited (Backward Citations)
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US2602821A
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US2919294A
Cited
US2801989A
Cited
US2779800A
Cited
US2945001A
Cited
US2856383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |