Patent US3235591A successfully refreshed from Google Patents.
US3235591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
B-carboxylic phosphinoborine ester polymers and their preparation
Assignee: American Potash and Chemical Corp
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Filing: 1962-04-30
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Granted: 1966-02-15
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Goodrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:00
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
THE B-CARBOXYLIC ESTER OF A PHOSPHINOBORINE POLYMER (R4R3PB(E)2)N, WHEREIN E IS INDEPENDENTLY SELECTED FOR EACH POSITION ON EACH MONOMERIC UNIT FROM THE GROUP CONSISTING OF LOWER ALKYLENE, CYCLOHEXYLENE, PHENYLENE, FORMYLOXY, BENZOYLOXY, LOWER ALKANOYLOXY, CYCLOHEXANOYLOXY, PHENYLACETYLOXY, LOWER ALKANEDIOYLOXY AND BENZENEDIOYLOXY SUBSTITUENTS, AT LEAST ONE OF SAID E SUBSTITUENTS BEING SELECTED FROM THE GROUP CONSISTING OF FORMYLOXY, BENZOYLOXY, LOWER ALKANOYLOXY, CYCLOHEXANOYLOXY, PHENYLACETYLOXY, LOWER ALKANEDIOYLOXY AND BENZENEDIOYLOXY SUBSTITUENTS IN SAID POLYMER; R3 AND R4 ARE SELECTED FOR EACH MONOMERIC UNIT FROM THE GROUP CONSISTING OF LOWER ALKYL, CYCLOHEXYL AND PHENYL SUBSTITUENTS; AND N IS AN INTEGER INDICATIVE OF THE DEGREE OF POLYMERIZATION OF SAID POLYMER.
Claim 2
Dependent Claim
102 words
THE B-CARBOXYLIC ESTER OF A PHOSPHINOBORINE POLYMER (R4R3PB(E)2)N, WHEREIN E IS INDEPENDENTLY SELECTED FOR EACH POSITION ON EACH MONOMERIC UNIT FROM THE GROUP CONSISTING OF LOWER ALKYLENE, CYCLOHEXYLENE, PHENYLENE, FORMYLOXY, BENZOYLOXY, LOWER ALKANOYLOXY, CYCLOHEXANOYLOXY, PHENYLACETYLOXY, LOWER ALKANEDIOYLOXY AND BENZENEDIOYLOXY SUBSTITUENTS, AT LEAST ONE OF SAID E SUBSTITUENTS BEING SELECTED FROM THE GROUP CONSISTING OF FORMYLOXY, BENZOYLOXY, LOWER ALKANOYLOXY, CYCLOHEXANOYLOXY, PHENYLACETYLOXY, LOWER ALKANEDIOYLOXY AND BENZENEDIOYLOXY SUBSTITUENTS IN SAID POLYMER; R3 AND R4 ARE SELECTED FOR EACH MONOMERIC UNIT FROM THE GROUP CONSISTING OF LOWER ALKYL, CYCLOHEXYL AND PHENYL SUBSTITUENTS; AND N IS AN INTEGER INDICATIVE OF THE DEGREE OF POLYMERIZATION OF SAID POLYMER.
Claim 3
Dependent Claim
22 words
PROCESS FOR THE PRODUCTION OF THE B-CARBOXYLIC ESTER OF A PHOSPHINOBORINE POLYMER COMPRISING: (A) ADMIXING AND (B) REACTING (I) THE B-HALOPHOSPHINOBORINE POLYMER
Claim 4
Dependent Claim
22 words
PROCESS FOR THE PRODUCTION OF THE B-CARBOXYLIC ESTER OF A PHOSPHINOBORINE POLYMER COMPRISING: (A) ADMIXING AND (B) REACTING (I) THE B-HALOPHOSPHINOBORINE POLYMER
References Cited (Backward Citations)
US2969342A
Cited
US3025326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |