US2582266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resins from natural polyhydroxy phenols
Assignee: Standard Dyewood Co
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Filing: 1950-07-14
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Granted: 1952-01-15
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Expires: 1970-07-14
Abstract
No abstract record available.
Inventors
- 👤 Monroe Kenneth Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:56
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/60; C07D311/62; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G8/00; C08G8/04; C08G8/08; C08G8/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
AS A NEW COMPOSITION OF MATTER, AN ARALKYL ETHER OF A FORMALDEHYDE CONDENSATION PRODUCT OF A CARBOXY-ALKYL ETHER OF A MEMBER OF THE GROUP OF CATECHOL TYPE OF TANNING AGENTS, ONE TO TWO OF THE PHENOLIC HYDROXYL GROUPS OF SAID TANNING AGENT BEING ETHERIFIED BY ARALKYL RADICALS AND THE REMAINING PHENOLIC HYDROXYL GROUPS BEING ETHERIFIED BY CARBOXY-ALKYL RADICALS, THE LATTER CONTAINING TWO TO THREE CARBON ATOMS.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |