Patent US2828221A successfully refreshed from Google Patents.
US2828221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating leather with polymers containing cyclic t-amino groups and the resulting article
Assignee: Rohm and Haas Co
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Filing: 1955-03-21
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Granted: 1958-03-25
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Paul W Mcwherter
- 👤 Benjamin B Kine
- 👤 Hugo A Alps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:32
CPC Classifications
C; C14; C14C; C14C11/00; C14C11/003; Y; Y10; Y10S; Y10S8/00; Y10S8/11; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE METHOD OF FINISHING LEATHER COMPRISING APPLYING THERETO AN AQUEOUS DISPERSION OF A WATER-INSOLUBLE LINEAR POLYMER OF MONOETHYLENICALLY UNSATURATED MOLECULES COMPRISING 3% TO 50% BY WEIGHT OF AT LEAST ONE MONOMERIC COMPOUNDS SELECTED FROM 4-VINYLPYRIDINE AND 2-METHYL-5-VINYLPYRIDINE, THEN DRYING THE COATED LEATHER, APPLYING THERETO A LACQUER, AT LEAST ONE OF SAID DISPERSION AND LACQUER BEING PIGMENTED, AND DRYING THE LACQUER.
Claim 2
Independent Claim
60 words
THE METHOD OF FINISHING LEATHER COMPRISING APPLYING THERETO AN AQUEOUS DISPERSION OF A WATER-INSOLUBLE LINEAR POLYMER OF MONOETHYLENICALLY UNSATURATED MOLECULES COMPRISING 3% TO 50% BY WEIGHT OF AT LEAST ONE MONOMERIC COMPOUNDS SELECTED FROM 4-VINYLPYRIDINE AND 2-METHYL-5-VINYLPYRIDINE, THEN DRYING THE COATED LEATHER, APPLYING THERETO A LACQUER, AT LEAST ONE OF SAID DISPERSION AND LACQUER BEING PIGMENTED, AND DRYING THE LACQUER.
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |