Patent US2925440A successfully refreshed from Google Patents.
US2925440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphinoborine compounds and their preparation
Assignee: American Potash and Chemical Corp
•
Filing: 1957-06-17
•
Granted: 1960-02-16
•
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
2026-11-06 12:13
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6596; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/307
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PHOSPHINOBORINE POLYMER OF RING CONFIGURATION COMPRISING A PLURALITY OF PHOSPHINOBORINE UNITS, SAID POLYMER HAVING THE FORMULA:
Claim 2
Dependent Claim
17 words
A PHOSPHINOBORINE POLYMER OF RING CONFIGURATION COMPRISING A PLURALITY OF PHOSPHINOBORINE UNITS, SAID POLYMER HAVING THE FORMULA:
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) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |