Patent US2642422A successfully refreshed from Google Patents.
US2642422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gorin
Assignee: —
•
Filing: —
•
Granted: 1953-06-16
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Expires: 1970-06-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:42
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/24; C07; C07C; C07C275/00; C07C275/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
THE METHOD OF SEPARATING A STRAIGHT CHAIN COMPOUND REPRESENTED BY GENERAL FORMULA (C):
Claim 2
Independent Claim
13 words
THE METHOD OF SEPARATING A STRAIGHT CHAIN COMPOUND REPRESENTED BY GENERAL FORMULA (C):
Claim 3
Dependent Claim
57 words
CRYSTALLINE COMPLEX OF UREA AND A DISUBSTITUTED STRAIGHT CHAIN COMPOUND HAVING ONE SUBSTITUENT GROUP JOINED TO A TERMINAL CARBON ATOM THEREOF AND HAVING ONE SUBSTITUENT GROUP JOINED TO OTHER THAN A TERMINAL CARBON ATOMS THEREOF SAID COMPOUND HAVING IN THE CHAIN AT LEAST SEVEN CARBON ATOMS AND SAID SUBSTITUENT GROUPS HAVING "LENGTHS" LESS THAN ABOUT 2.3 A.
Claim 4
Dependent Claim
57 words
CRYSTALLINE COMPLEX OF UREA AND A DISUBSTITUTED STRAIGHT CHAIN COMPOUND HAVING ONE SUBSTITUENT GROUP JOINED TO A TERMINAL CARBON ATOM THEREOF AND HAVING ONE SUBSTITUENT GROUP JOINED TO OTHER THAN A TERMINAL CARBON ATOMS THEREOF SAID COMPOUND HAVING IN THE CHAIN AT LEAST SEVEN CARBON ATOMS AND SAID SUBSTITUENT GROUPS HAVING "LENGTHS" LESS THAN ABOUT 2.3 A.
References Cited (Backward Citations)
US2499820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |