Patent US3092594A successfully refreshed from Google Patents.
US3092594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resin obtained from coal tar pitch reaction products and process for preparing same
Assignee: Bayer Corp
•
Filing: 1960-04-29
•
Granted: 1963-06-04
•
Expires: 1980-04-29
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6476
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
PLASTICS OBTAINED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH THE REACTION PRODUCT OF A COAL TAR PITCH AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKYLENE OXIDE HAVING 2 TO 8 CARBON ATOMS AND AN ALKYLENE CARBONATE.
Claim 2
Dependent Claim
42 words
PLASTICS OBTAINED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH THE REACTION PRODUCT OF A COAL TAR PITCH AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKYLENE OXIDE HAVING 2 TO 8 CARBON ATOMS AND AN ALKYLENE CARBONATE.
References Cited (Backward Citations)
US2976256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |