Patent US3213138A successfully refreshed from Google Patents.
US3213138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N, n-disubstituted-n'-phenylalkyl hydrazines
Assignee: Colgate Palmolive Co
•
Filing: 1958-12-18
•
Granted: 1965-10-19
•
Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 John H Biel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:52
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/28; C07D295/30; C07C; C07C243/00; C07D217/00; C07D217/02; C07D217/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A COMPOUND OF THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
11 words
A COMPOUND OF THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
US2305748A
Cited
US2383134A
Cited
US2688040A
Cited
US2860140A
Cited
US2784141A
Cited
US2818367A
Cited
US2850425A
Cited
US2804422A
Cited
US2892841A
Cited
US2933532A
Cited
US2933531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |