US2921095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphinoborine compounds and their preparation
Assignee: Individual
•
Filing: 1957-06-17
•
Granted: 1960-01-12
•
Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Anton B Burg
- 👤 Ross I Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:12
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6596
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A PHOSPHINOBORINE RING OF THE FORMULA @SP (RR''PBR"R"'')N
Claim 2
Dependent Claim
8 words
A PHOSPHINOBORINE RING OF THE FORMULA @SP (RR''PBR"R"'')N
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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |