US3387405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous film mulch from polyvinyl alcohol and asphalt or wax
Assignee: EIDP Inc
•
Filing: 1966-06-27
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Granted: 1968-06-11
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 John M Iwasky
- 👤 Bernard C Lawes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:10
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/30; A01G13/32; C; C09; C09K; C09K17/00; C09K17/52; A01G2013/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR MULCING SOIL WHICH COMPRISES APPLYING THERETO AND SUBSTANTIALLY SIMULTANEOUSLY GELLING THEREON AS A CONTINUOUS LAYER A FLUID AQUEOUS FOAM WHICH HAS A VOLUME OF AT LEAST 0.1 CUBIC FOOT PER POUND AND CONTAINS AT LEAST 0.5 WEIGHT PERCENT OF DISSOLVED POLYVINYL ALCOHOL WHICH IS AT LEAST 80 PERCENT HYDROLYZED AND HAS A REFERENCE VISCOSITY OF AT LEAST 30 CENTIPOISES, AND, BASED ON THE WEIGHT OF SAID POLYVINYL ALCOHOL, AT LEAST 50 PERCENT OF EMULSIFIED ASPHALT OR WAX SOFTENING BELOW 220* F., SAID FOAM BEING APPLIED AT A RATE CORRESPONDING TO AT LEAST 15 POUNDS OF POLYVINYL ALCOHOL PER ACRE OF SOIL TO BE COVERED.
Claim 2
Dependent Claim
107 words
A PROCESS FOR MULCING SOIL WHICH COMPRISES APPLYING THERETO AND SUBSTANTIALLY SIMULTANEOUSLY GELLING THEREON AS A CONTINUOUS LAYER A FLUID AQUEOUS FOAM WHICH HAS A VOLUME OF AT LEAST 0.1 CUBIC FOOT PER POUND AND CONTAINS AT LEAST 0.5 WEIGHT PERCENT OF DISSOLVED POLYVINYL ALCOHOL WHICH IS AT LEAST 80 PERCENT HYDROLYZED AND HAS A REFERENCE VISCOSITY OF AT LEAST 30 CENTIPOISES, AND, BASED ON THE WEIGHT OF SAID POLYVINYL ALCOHOL, AT LEAST 50 PERCENT OF EMULSIFIED ASPHALT OR WAX SOFTENING BELOW 220* F., SAID FOAM BEING APPLIED AT A RATE CORRESPONDING TO AT LEAST 15 POUNDS OF POLYVINYL ALCOHOL PER ACRE OF SOIL TO BE COVERED.
References Cited (Backward Citations)
US2945322A
Cited
US2875555A
Cited
US2916855A
Cited
US3077054A
Cited
FR1232237A
Cited
US3024570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |