Patent US2871202A successfully refreshed from Google Patents.
US2871202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organo-phosphorus polymers
Assignee: Union Oil Company of California
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Filing: 1955-06-27
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Granted: 1959-01-27
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Carleton B Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:42
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE PROCESS WHICH COMPRISES ADNIXING A PHOSPHORIC ESTER SELECTED FROM THE CLASS CONSISTING OF ALKYL METAPHOSPHATES AND ALKYL TRITHIOMETAPHOSPHATES IN WHICH THE ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS WITH AT LEAST ABOUT ONE MOLECULAR EQUIVALENT OF AN ALKYLENE COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
46 words
THE PROCESS WHICH COMPRISES ADNIXING A PHOSPHORIC ESTER SELECTED FROM THE CLASS CONSISTING OF ALKYL METAPHOSPHATES AND ALKYL TRITHIOMETAPHOSPHATES IN WHICH THE ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS WITH AT LEAST ABOUT ONE MOLECULAR EQUIVALENT OF AN ALKYLENE COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2636876A
Cited
US2616873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |