US4269865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a food product from feathers
Assignee: Nestle Purina PetCare Co
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Filing: 1979-10-12
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Granted: 1981-05-26
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Expires: 1999-10-12
Abstract
Abstract A process for the conversion of feathers into a foodstuff is disclosed wherein moistened feathers are subjected to an elevated temperature and a pressure of 15-40 psig without agitation to form a pulpy mass of the feathers. The pulpy mass of feathers is then hydrolyzed at a pressure of 40-80 psig, to convert the feathers into a highly nutritious food product. The converted feathers can be dried to form a highly nutritious feather meal or combined with other poultry by-products such as offal or blood to form an aggregate or mixture of these by-products.
Inventors
- 👤 Rowland Retrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:28
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/10; A23J3/00; A23J3/30; Y; Y10; Y10S; Y10S426/00; Y10S426/807; Y10S530/00; Y10S530/827; Y10S530/859
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A process for the conversion of feathers into a food product comprising: a. subjecting moistened feathers in a closed tank to a pressure of 15-40 psig and elevated temperature without agitation for at least about 5 minutes but less than about 15 minutes to form a pumpable pulpy mass of feathers; b. pumping the pulpy mass to a digester c. agitating the pulpy mass of feathers in the digester at a pressure greater than the pressure in step (a) and in the range of 40-80 psig for at least about 3 minutes but less than about 15 minutes to hydrolyze and digest the feathers to convert the mass of feathers into a highly nutritious food product having greater than about 70% digestible protein.
Claim 2
Dependent Claim
123 words
A process for the conversion of feathers into a food product comprising: a. subjecting moistened feathers in a closed tank to a pressure of 15-40 psig and elevated temperature without agitation for at least about 5 minutes but less than about 15 minutes to form a pumpable pulpy mass of feathers; b. pumping the pulpy mass to a digester c. agitating the pulpy mass of feathers in the digester at a pressure greater than the pressure in step (a) and in the range of 40-80 psig for at least about 3 minutes but less than about 15 minutes to hydrolyze and digest the feathers to convert the mass of feathers into a highly nutritious food product having greater than about 70% digestible protein.
Claim 3
Dependent Claim
14 words
The process of claim 1 including the step of drying said hydrolyzed feather product.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein said pulpy mass is formed at pressures of 20 psig for 10 minutes.
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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |