US2557997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoliant and herbicide
Assignee: Wyeth Holdings LLC
•
Filing: 1949-07-15
•
Granted: 1951-06-26
•
Expires: 1969-07-15
Abstract
No abstract record available.
Inventors
- 👤 Richard L Phelps
- 👤 Jason M Salsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:12
CPC Classifications
A; A01; A01N; A01N59/00; A01N59/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE PRODUCT OBTAINED BY REACTING LIME NITROGEN WITH A MEMBER OF THE GROUP CONSISTING OF SODIUM HYDROXIDE AND SODIUM CARBONATE, FOLLOWED BY DRYING AND COMMINUTING THE RESULTANT REACTION MASS, SAID PRODUCT HAVING SUPERIOR HERBICIDAL AND DEFOLIATION PROPERTIES OVER AN EQUAL AMOUNT OF PURE CONTAINED SODIUM ACID CYANAMIDE.
Claim 2
Dependent Claim
47 words
THE PRODUCT OBTAINED BY REACTING LIME NITROGEN WITH A MEMBER OF THE GROUP CONSISTING OF SODIUM HYDROXIDE AND SODIUM CARBONATE, FOLLOWED BY DRYING AND COMMINUTING THE RESULTANT REACTION MASS, SAID PRODUCT HAVING SUPERIOR HERBICIDAL AND DEFOLIATION PROPERTIES OVER AN EQUAL AMOUNT OF PURE CONTAINED SODIUM ACID CYANAMIDE.
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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |