Patent US3042718A successfully refreshed from Google Patents.
US3042718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea compositions
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1959-12-09
•
Granted: 1962-07-03
•
Expires: 1979-12-09
Abstract
No abstract record available.
Inventors
- 👤 Evans Peter
- 👤 Brooke Dennis Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:51
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
UREA HAVING IMPROVED FREE FLOWING PROPERTIES AND IMPROVED RESISTANCE TO CAKING WHICH CONSISTS ESSENTIALLY OF PARTICULATE UREA AND FROM 0.0001% TO 0.5% BY WEIGHT OF A SUBSTITUTED UREA OF THE FORMULA
Claim 2
Dependent Claim
31 words
UREA HAVING IMPROVED FREE FLOWING PROPERTIES AND IMPROVED RESISTANCE TO CAKING WHICH CONSISTS ESSENTIALLY OF PARTICULATE UREA AND FROM 0.0001% TO 0.5% BY WEIGHT OF A SUBSTITUTED UREA OF THE FORMULA
Claim 3
Dependent Claim
17 words
PARTICULATE UREA AS CLAIMED IN CLAIM 1 WHEREIN R1 IS A TOLYL GROUP AND R2 IS HYDROGEN.
References Cited (Backward Citations)
US2569984A
Cited
GB266378A
Cited
US2386937A
Cited
US2436771A
Cited
US2712557A
Cited
US2768971A
Cited
GB771420A
Cited
US2826612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |