US2511544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diol-dilsocyanate high molecular polymerization products
Assignee: Individual
•
Filing: 1938-11-08
•
Granted: 1950-06-13
•
Expires: 1958-11-08
Abstract
No abstract record available.
Inventors
- 👤 Rinke Heinrich
- 👤 Schild Heinz
- 👤 Siefken Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
A LINEAR POLYMER COMPRISING ESSENTIALLY STRUCTURAL UNITS OF THE FORMULA
References Cited (Backward Citations)
US1882808A
Cited
US2122781A
Cited
US2145242A
Cited
US2181663A
Cited
US2216736A
Cited
US2284637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |