Patent US3329709A successfully refreshed from Google Patents.
US3329709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N, n'-bis-[2-(3', 4'-dihydroxyphenyl)-2-hydroxyethyl]-hexamethylene-diamine and salts thereof
Assignee: Osterreichische Stickstoffwerke AG
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Filing: 1964-06-05
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Granted: 1967-07-04
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Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Schmid Otto
- 👤 Lerchenthal Stormann-Menninger
- 👤 Wismayr Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:03
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/46; C07C215/56; C07C215/58; C07C215/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE SALTS WITH NON-TOXIC ACID OF N,N''-BIS(2-(3'',4''DIHYDROXYPHENYL)-2-HYDROXYETHYL)-HEXAMETHYLENE-DIAMINE.
Claim 2
Dependent Claim
7 words
THE SALTS WITH NON-TOXIC ACID OF N,N''-BIS(2-(3'',4''DIHYDROXYPHENYL)-2-HYDROXYETHYL)-HEXAMETHYLENE-DIAMINE.
References Cited (Backward Citations)
US2653977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |