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Patent US2689249A successfully refreshed from Google Patents.
US2689249A
Expired / Lapsed
US
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Dialkyl-2-iminoimidazolidines and their salts
Assignee: Rohm and Haas Co
•
Filing: 1952-07-10
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Granted: 1954-09-14
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Expires: 1972-07-10
Abstract
No abstract record available.
Inventors
- 👤 Benneville Peter L De
- 👤 Lawrence J Exner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:27
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/44; C07D233/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AS NEW CHEMICAL COMPOUNDS, IMINOIMIDAZOLIDINES OF THE FORMULA
Claim 2
Dependent Claim
8 words
AS NEW CHEMICAL COMPOUNDS, IMINOIMIDAZOLIDINES OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |