US2840545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-vinyl-nu'-aminoalkyl-nu, nu'-alkyleneureas and polymers thereof
Assignee: Rohm and Haas Co
•
Filing: 1955-09-09
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Granted: 1958-06-24
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Expires: 1975-09-09
Abstract
No abstract record available.
Inventors
- 👤 Robert S Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:15
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D239/08; C07D239/10; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C07D233/36; C10; C10M; C10M1/00; C10M1/08; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2221/00; C10M2221/02; C10N; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2727016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |