US2835452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for granulating urea-formaldehyde fertilizer compositions
Assignee: EIDP Inc
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Filing: 1954-06-28
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Granted: 1958-05-20
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Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Cline William Edward
- 👤 Lancey Merton Miles De
- 👤 Engelbrecht Donald Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:57
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/005; B; B01; B01J; B01J2/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
IN A PROCESS FOR CONVERTING MOIST UREA-FORMALDEHYDE TO DRIED PARTICLES OF A DESIRED RANGE OF GRANULE SIZE THE STEPS WHICH COMPRISE AGITATING, IN A GRANULATING MERANS, MOIST UREA-FORMALDEHYDE TO PRODUCE GRANULATION THEROE, SCREENING THE RESULTANT MOIST GRANULAR PRODUCT, CONTINUOUSLY FORWARDING THE MOIST FINES PRODUCED BY THE SAID SCREENING TO A DRIER BY MEANS OF A WEIGHT BELT, DRYING THE SAID FINES IN THE SAID DRIER, CONTINUOUSLY FORWARDING ALL OF THE MOIST COARSE GRANULES PRODUCED BY SAID SCREENING, BY MEANS OF ANOTHER WEIGH BELT, TO A CRUSHER SUPPLYING ADDITIONAL MOIST SOLID TO THE SAID GRANULATING MEANS, WHILE RECYCLING A PART OF THE SAID DRIED FINES TO THE SAID GRANULATING MEANS, SAID RECYCLED PART BE%ING OBTAINED BY SCREENING THE DRIED FINES TO SEPRATE THERFROM PARTICLES OF THE DESIRED RANGE OF SIZE AND RECYCLING THE OVERSIZE AND UNDERSIZE DRIED FINES, THE RATE OF FEEDING SAID DRIED FINES TO THE GRANULATING MEANS BEING CONTROLLED DIRECTLY BY THE RATIO OF WEIGHT PER UNIT TIME OF MATERIAL CARRIED BY THE WEIGH BELT FOR THE SAID MOIST COARSE GRANULES, TO THE WEIGHT PER UNIT TIME OF MATERIAL CARRIED BY THE WEIGHT BELT FOR THE MOIST FINES.
Claim 2
Dependent Claim
189 words
IN A PROCESS FOR CONVERTING MOIST UREA-FORMALDEHYDE TO DRIED PARTICLES OF A DESIRED RANGE OF GRANULE SIZE THE STEPS WHICH COMPRISE AGITATING, IN A GRANULATING MERANS, MOIST UREA-FORMALDEHYDE TO PRODUCE GRANULATION THEROE, SCREENING THE RESULTANT MOIST GRANULAR PRODUCT, CONTINUOUSLY FORWARDING THE MOIST FINES PRODUCED BY THE SAID SCREENING TO A DRIER BY MEANS OF A WEIGHT BELT, DRYING THE SAID FINES IN THE SAID DRIER, CONTINUOUSLY FORWARDING ALL OF THE MOIST COARSE GRANULES PRODUCED BY SAID SCREENING, BY MEANS OF ANOTHER WEIGH BELT, TO A CRUSHER SUPPLYING ADDITIONAL MOIST SOLID TO THE SAID GRANULATING MEANS, WHILE RECYCLING A PART OF THE SAID DRIED FINES TO THE SAID GRANULATING MEANS, SAID RECYCLED PART BE%ING OBTAINED BY SCREENING THE DRIED FINES TO SEPRATE THERFROM PARTICLES OF THE DESIRED RANGE OF SIZE AND RECYCLING THE OVERSIZE AND UNDERSIZE DRIED FINES, THE RATE OF FEEDING SAID DRIED FINES TO THE GRANULATING MEANS BEING CONTROLLED DIRECTLY BY THE RATIO OF WEIGHT PER UNIT TIME OF MATERIAL CARRIED BY THE WEIGH BELT FOR THE SAID MOIST COARSE GRANULES, TO THE WEIGHT PER UNIT TIME OF MATERIAL CARRIED BY THE WEIGHT BELT FOR THE MOIST FINES.
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |