US3029212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic tanning agent and process for preparing same
Assignee: Nopco Chemical Co
•
Filing: 1957-09-09
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Granted: 1962-04-10
•
Expires: 1977-09-09
Abstract
No abstract record available.
Inventors
- 👤 Lipowski Stanley
- 👤 Charles A Fetscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:18
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/18; C14C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A SYNTHETIC TANNING AGENT COMPRISING AN AQUEOUS SOLUTION OF A MIXTURE OF CONDENSATION PRODUCTS HAVING THE BASIC FORMULA
Claim 2
Dependent Claim
18 words
A SYNTHETIC TANNING AGENT COMPRISING AN AQUEOUS SOLUTION OF A MIXTURE OF CONDENSATION PRODUCTS HAVING THE BASIC FORMULA
References Cited (Backward Citations)
US2129553A
Cited
US1988985A
Cited
US2174287A
Cited
GB518858A
Cited
US2268091A
Cited
US2522569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |