US2595221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of polyhydroxy-benzoic acids and method for their preparation
Assignee: United States Department of Agriculture
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Filing: 1947-04-22
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Granted: 1952-05-06
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Expires: 1967-04-22
Abstract
No abstract record available.
Inventors
- 👤 Waldo C Ault
- 👤 George C Nutting
- 👤 James K Well
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS OF PRODUCING AN ESTER OF A POLYHYDROXYBENZOIC ACID OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
14 words
A PROCESS OF PRODUCING AN ESTER OF A POLYHYDROXYBENZOIC ACID OF THE GENERAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |