Patent US5112302A successfully refreshed from Google Patents.
US2884459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamine derivatives containing hydroxyalkyl groups
Assignee: Visco Products Co
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Filing: 1955-12-15
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Granted: 1959-04-28
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Expires: 1975-12-15
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Virgil L Seale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:50
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A COMPOUND HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
A COMPOUND HAVING THE FOLLOWING GENERAL FORMULA:
Claim 3
Dependent Claim
7 words
THE COMPOUND HAVING THE FOLLOWING GENERAL FORMULA
Claim 4
Dependent Claim
7 words
THE COMPOUND HAVING THE FOLLOWING GENERAL FORMULA
References Cited (Backward Citations)
FR801121A
Cited
US2697118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |