Patent US1841476A successfully refreshed from Google Patents.
Patent US3387405A successfully refreshed from Google Patents.
US3387405A
Expired / Lapsed
US
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Continuous film mulch from polyvinyl alcohol and asphalt or wax
Assignee: EIDP Inc
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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
2026-11-09 05:33
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)
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Cited
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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 |