Patent US2679521A successfully refreshed from Google Patents.
US2679521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxotropylated esters of pomfcar
Assignee: —
•
Filing: —
•
Granted: 1954-05-25
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Expires: 1971-05-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:50
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C07; C07C; C07C69/00; C07C69/34; C07C69/38; C07C69/40; C07C69/76; C07C69/80
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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |