Patent US2806811A successfully refreshed from Google Patents.
Patent US2771471A successfully refreshed from Google Patents.
US2771471A
Expired / Lapsed
US
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Polycarboxy acid esters of oxypropylated hexides
Assignee: Baker Petrolite LLC
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Filing: 1952-12-02
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Granted: 1956-11-20
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Expires: 1972-12-02
Abstract
No abstract record available.
Inventors
- 👤 Groote Melvin De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:07
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
HYDROPHILE SYNTHETIC PRODUCTS, SAID HYDROPHILE SYNTHETIC PRODUCTS BEING CHARACTERIZED BY THE FOLLOWING FORMULA
Claim 2
Dependent Claim
13 words
HYDROPHILE SYNTHETIC PRODUCTS, SAID HYDROPHILE SYNTHETIC PRODUCTS BEING CHARACTERIZED BY THE FOLLOWING FORMULA
References Cited (Backward Citations)
US2562878A
Cited
US2626925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |