US2642423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge
Assignee: —
•
Filing: —
•
Granted: 1953-06-16
•
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
2026-11-01 14:17
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07C275/00; C07C275/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
CRYSTALLINE COMPLEX OF UREA AND A STRAIGHT CHAIN MONO-OLEFIN HAVING A MINIMUM OF SIX CARBON ATOMS IN THE CHAIN.
Claim 2
Dependent Claim
19 words
CRYSTALLINE COMPLEX OF UREA AND A STRAIGHT CHAIN MONO-OLEFIN HAVING A MINIMUM OF SIX CARBON ATOMS IN THE CHAIN.
References Cited (Backward Citations)
US2518677A
Cited
US2569984A
Cited
GB443795A
Cited
US2300134A
Cited
US2346632A
Cited
US2376008A
Cited
GB671456A
Cited
US2499820A
Cited
US2520715A
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 |