Patent US2733261A successfully refreshed from Google Patents.
US2733261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-akylisocyanates of a-phenyl ethyl-
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
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Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/16; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AS NEW COMPOSITIONS OF MATTER THE ISOCYANTES DEFINED BY THE FORMULA
Claim 2
Dependent Claim
11 words
AS NEW COMPOSITIONS OF MATTER THE ISOCYANTES DEFINED BY THE FORMULA
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |