US2695839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and compositions for killing weeds
Assignee: SGL Carbon Corp
•
Filing: 1951-11-21
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Granted: 1954-11-30
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Expires: 1971-11-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Kenney
- 👤 Joseph W Girard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:13
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A COMPOSITION FOR KILLING GROWING WEEDS COMPRISING ESSENTIALLY A CALCINED DIATOMACEOUS EARTH AGGREGATE IMPREGNATED WITH HERBICIDAL AGENT, SAID AGGREGATE HAVING A MINIMUM PARTICLE SIZE OF ABOUT +30 MESH AND BEING RESISTANT TO ABRASION, CRUSHING AND TO SLACKING WHEN WET BY WATER.
Claim 2
Dependent Claim
41 words
A COMPOSITION FOR KILLING GROWING WEEDS COMPRISING ESSENTIALLY A CALCINED DIATOMACEOUS EARTH AGGREGATE IMPREGNATED WITH HERBICIDAL AGENT, SAID AGGREGATE HAVING A MINIMUM PARTICLE SIZE OF ABOUT +30 MESH AND BEING RESISTANT TO ABRASION, CRUSHING AND TO SLACKING WHEN WET BY WATER.
References Cited (Backward Citations)
US2604428A
Cited
US2523228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |