Patent US3219635A successfully refreshed from Google Patents.
US3219635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethanes prepared from high molecular weight telomeric glycols
Assignee: Standard Oil Co
•
Filing: 1964-02-17
•
Granted: 1965-11-23
•
Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Donald D Emrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6204; C07; C07F; C07F5/00; C07F5/02; C07F5/04; C08G18/30; C08G18/32; C08G18/3203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A PROCESS FOR PRODUCING TELOMERIC URETHANES WHICH COMPRISES REACTING AN ISOCYANATE WITH A TELOMER GLYCOL HAVING THE FORMULA
Claim 2
Dependent Claim
18 words
A PROCESS FOR PRODUCING TELOMERIC URETHANES WHICH COMPRISES REACTING AN ISOCYANATE WITH A TELOMER GLYCOL HAVING 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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |