Patent US3358010A successfully refreshed from Google Patents.
US3358010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biuret polyisocyanates
Assignee: Bayer Corp
•
Filing: 1964-03-11
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Granted: 1967-12-12
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Expires: 1984-03-11
Abstract
No abstract record available.
Inventors
- 👤 J W Britain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:32
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1854; C07C273/1863; C07C273/1872
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF PREPARING BIURET POLYISOCYANATES WHICH COMPRISES REACTING AT LEAST 2.5 MOLS OF A MEMBER SELECTED FROM THE GROUP CONSISITNG OF ALIPHATIC DISOCYANATES AND ALICYCLIC DISOCYANAES WITH ONE MOL OF A MONOHYDRIC TERTIARY ALCOHOL AT A TEMPERATURE OF FROM ABOUT 70* C. TO ABOUT 205*C.
Claim 2
Independent Claim
46 words
A METHOD OF PREPARING BIURET POLYISOCYANATES WHICH COMPRISES REACTING AT LEAST 2.5 MOLS OF A MEMBER SELECTED FROM THE GROUP CONSISITNG OF ALIPHATIC DISOCYANATES AND ALICYCLIC DISOCYANAES WITH ONE MOL OF A MONOHYDRIC TERTIARY ALCOHOL AT A TEMPERATURE OF FROM ABOUT 70* C. TO ABOUT 205*C.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |