US2833744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyureas and process of preparing same
Assignee: CIBA PHARM PROD Inc
•
Filing: 1954-08-24
•
Granted: 1958-05-06
•
Expires: 1974-08-24
Abstract
No abstract record available.
Inventors
- 👤 Neher Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:07
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A MEMBER OF THE GROUP CONSISTING OF POLYUREAS, MIXTURES THEREOF, AND THE SALTS THEREOF, WHICH CAN BE REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
22 words
A MEMBER OF THE GROUP CONSISTING OF POLYUREAS, MIXTURES THEREOF, AND THE SALTS THEREOF, WHICH CAN BE REPRESENTED BY THE GENERAL FORMULA
Claim 3
Dependent Claim
5 words
THE POLYUREA OF THE FORMULA
Claim 4
Dependent Claim
5 words
THE POLYUREA OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |