Patent US3129091A successfully refreshed from Google Patents.
US3129091A
Expired / Lapsed
US
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Granular ureaform fertilizer
Assignee: Honeywell International Inc
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Filing: 1960-10-10
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Granted: 1964-04-14
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Expires: 1980-10-10
Abstract
No abstract record available.
Inventors
- 👤 Adrian E Buter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:50
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/02; Y; Y10; Y10S; Y10S71/00; Y10S71/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A PROCESS FOR PRODUCTION OF A GRANULAR UREAFORM FERTILIZER, THE STEPS COMPRISING IMPREGNATING FRESHLY PREPARED EXPANDED VERMICULITE, SAID VERMICULITE BEING AT A TEMPERATURE LYING WITHIN THE RANGE OF 500 TO 700*F., WITH UREAFORM BY SPRAYING A PREMIXED SOLUTION OF UREA IN A UREA-FORMALDEHYDE CONCENTRATE, WHICH SOLUTION IS AT TEMPERATURES OF ABOUT 140-230*F. ON TO THE SURFACE OF SAID FRESHLY PREPARED EXPANDED VERMICULITE; PROMPTLY TREATING THE MIXTURE WITH AN ACID TO FORM UREAFORM UNDER THE ACID CONDITIONS AT TEMPERATURES OF AT LEAST ABOUT 212* F.; NEUTRALIZING THE ACIDULATED PRODUCT WITHIN ABOUT 5 MINUTES OF THE ACID TREATMENT AND RECOVERING A GRANULAR UREAFORM FERTILIZER CONSISTING ESSENTIALLY OF EXPANDED VERMICULITE IMPREGNATED WITH UREAFORM FORMED IN SITU.
Claim 2
Dependent Claim
114 words
IN A PROCESS FOR PRODUCTION OF A GRANULAR UREAFORM FERTILIZER, THE STEPS COMPRISING IMPREGNATING FRESHLY PREPARED EXPANDED VERMICULITE, SAID VERMICULITE BEING AT A TEMPERATURE LYING WITHIN THE RANGE OF 500 TO 700*F., WITH UREAFORM BY SPRAYING A PREMIXED SOLUTION OF UREA IN A UREA-FORMALDEHYDE CONCENTRATE, WHICH SOLUTION IS AT TEMPERATURES OF ABOUT 140-230*F. ON TO THE SURFACE OF SAID FRESHLY PREPARED EXPANDED VERMICULITE; PROMPTLY TREATING THE MIXTURE WITH AN ACID TO FORM UREAFORM UNDER THE ACID CONDITIONS AT TEMPERATURES OF AT LEAST ABOUT 212* F.; NEUTRALIZING THE ACIDULATED PRODUCT WITHIN ABOUT 5 MINUTES OF THE ACID TREATMENT AND RECOVERING A GRANULAR UREAFORM FERTILIZER CONSISTING ESSENTIALLY OF EXPANDED VERMICULITE IMPREGNATED WITH UREAFORM FORMED IN SITU.
References Cited (Backward Citations)
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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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |