Patent US6428570B1 successfully refreshed from Google Patents.
US3102875A
Expired / Lapsed
US
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Polyurethane reaction product and method for making same
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-08-07
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Granted: 1963-09-03
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Expires: 1973-08-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/16; C08G18/18; C08G18/1875; C08G18/22; C08G18/225; C08G18/26; C08G18/3278; C08G18/3281; C08G18/36; C08G18/38; C08G18/3855; C08G18/3876; C08G18/40; C08G18/48; C08G18/4829; C08G18/4833; C08G18/60; C08G18/62; C08G18/6287; C08G18/64; C08G18/6415; C08G18/6446; C08G18/6484; C08G18/67; C08G18/675; C09; C09J; C09J175/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A PROCESS FOR MAKING A REACTION PRODUCT WHICH COMPRISES REACTING (1) A CONDENSATE OF PROPYLENE OXIDE AND A POLYHYDRIC ALCOHOL HAVING FROM 3 TO 4 HYDROXYL GROUPS AND (2) A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ORGANIC POLYISOCYANATE AND AN ORGANIC POLYISOTHIOCYANATE, THE AMOUNT OF (2) BEING IN EXCESS OF THAT THEORETICALLY REQUIRED TO REACT WITH THE REACTIVE HYDROGENS OF SAID CONDENSATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |