Patent US3147138A successfully refreshed from Google Patents.
US3147138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating leather
Assignee: Bayer AG
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Filing: 1962-01-16
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Granted: 1964-09-01
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Expires: 1982-01-16
Abstract
No abstract record available.
Inventors
- 👤 Muller Erwin
- 👤 Speicher Wolfgang
- 👤 Coppee Peter
- 👤 Merten Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:19
CPC Classifications
C; C14; C14C; C14C11/00; C14C11/003; C14C11/006; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31558
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS FOR BOTTOMING LEATER WHICH COMPRISES APPLYING TO THE LEATHER IN AN AQUEOUS SOLUTION AN HYDROXYL TERMINATED REACTION PRODUCT OF A POLYHYDRIC ALCOHOL AND AN ORGANIC POLYISOCYANATE.
Claim 2
Dependent Claim
28 words
A PROCESS FOR BOTTOMING LEATER WHICH COMPRISES APPLYING TO THE LEATHER IN AN AQUEOUS SOLUTION AN HYDROXYL TERMINATED REACTION PRODUCT OF A POLYHYDRIC ALCOHOL AND AN ORGANIC POLYISOCYANATE.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |