US3053697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the filling of leather
Assignee: Bayer AG
•
Filing: 1958-05-12
•
Granted: 1962-09-11
•
Expires: 1978-05-12
Abstract
No abstract record available.
Inventors
- 👤 Zorn Bruno
- 👤 Luck Wolfhard
- 👤 Mauthe Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:02
CPC Classifications
C; C14; C14C; C14C9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/4935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
PROCESS FOR THE FILLING OF LEATHER WHICH COMPRISES MILLING LEATHER WITH A FINELY DIVIDED FILLER IN THE PRESENCE OF A WATER-SOLUBLE DISPERSING AGENT, PRECIPITAABLE BY ACID, OBTAINABLE BY CONDENSATION OF CARBAMIDE WITH FORMALDEHYDE IN A NONACID MEDIUM AND CONTAINING A WATER-SOLUBLE SALT OF AN ORGANIC SULFONIC ACID, AND IN THE PRESENCE OF SUFFICIENT ACID TO PRECIPITATE THE DISPERSING AGENT.
Claim 2
Dependent Claim
59 words
PROCESS FOR THE FILLING OF LEATHER WHICH COMPRISES MILLING LEATHER WITH A FINELY DIVIDED FILLER IN THE PRESENCE OF A WATER-SOLUBLE DISPERSING AGENT, PRECIPITAABLE BY ACID, OBTAINABLE BY CONDENSATION OF CARBAMIDE WITH FORMALDEHYDE IN A NONACID MEDIUM AND CONTAINING A WATER-SOLUBLE SALT OF AN ORGANIC SULFONIC ACID, AND IN THE PRESENCE OF SUFFICIENT ACID TO PRECIPITATE THE DISPERSING AGENT.
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) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |