US3071552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus and boron-containing polymers
Assignee: American Potash and Chemical Corp
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Filing: 1958-08-20
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Granted: 1963-01-01
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Expires: 1978-08-20
Abstract
No abstract record available.
Inventors
- 👤 Anton B Burg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:15
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A PROCESS FOR THE PREPARATION OF A PHOSPHINATED BORON HYDRIDE POLYMER, A CLOSED RING PHOSPHINOBORINE AND A NITROGEN-CONTAINING PHOSPHINATED BORON HYDRIDE POLYMER, RESPECTIVELY, COMPAIRING: MIXING A BORON HYDRIDE WITH A COMPOUND SELECTED FROM THE CLASS CONSISTING OF TETRAMETHYLIBIPHOSPHINE AND A COMPOUND OF THE FORMULA RR''NPR"R''" WHEREIN R. AND R'' ARE SELECTED FROM THE CLASS CONSISTING OF TWO INDIVIDUAL LOWER ALKYL GROUPS AND A SINGLE POLYMETHYLENE GROUP AND R" AND R''" ARE SELECTED FROM THE CLASS CONSISTING OF TWO INDIVIDUAL LOWER ALKYL GROUPS AND A SINGLE POLYMETHYLENE GROUP AND HEATING THE MIXTURE SO FORMED TO A TEMPERATURE OF AT LEAST ABOUT 120*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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |