Patent US3061625A successfully refreshed from Google Patents.
US3061625A
Expired / Lapsed
US
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Phosphates and thiophosphates
Assignee: Weston Chemical Corp
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Filing: 1961-06-15
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Granted: 1962-10-30
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Expires: 1981-06-15
Abstract
No abstract record available.
Inventors
- 👤 Friedman Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/692; C08G63/6924; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C07F9/141; C07F9/1411; C07F9/16; C07F9/165; C07F9/1651; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C08G18/5081; C08G18/5084; C08G18/5093; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4071
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
TRIS POLYPROPYLENE GLYCOL PHOSPHATES WHEREIN EACH OF THE POLYPROPYLENE GLYCOL UNITS HAS AT LEAST 3 PROPYLENE OXIDE UNITS THE HYDROXYL GROUPS BEING SECONDARY HYDROXYL GROUPS.
Claim 2
Dependent Claim
25 words
TRIS POLYPROPYLENE GLYCOL PHOSPHATES WHEREIN EACH OF THE POLYPROPYLENE GLYCOL UNITS HAS AT LEAST 3 PROPYLENE OXIDE UNITS THE HYDROXYL GROUPS BEING SECONDARY HYDROXYL GROUPS.
Claim 3
Dependent Claim
25 words
TRIS POLYPROPYLENE GLYCOL THIOPHOSPHATES WHEREIN EACH OF THE POLYPROPYLENE GLYCOL UNITS HAS AT LEAST 3 PROPYLENE OXIDE UNITS THE HYDROXYL GROUPS BEING SECONDARY HYDROXYL GROUPS.
Claim 4
Dependent Claim
25 words
TRIS POLYPROPYLENE GLYCOL THIOPHOSPHATES WHEREIN EACH OF THE POLYPROPYLENE GLYCOL UNITS HAS AT LEAST 3 PROPYLENE OXIDE UNITS THE HYDROXYL GROUPS BEING SECONDARY HYDROXYL GROUPS.
References Cited (Backward Citations)
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Cited
US2586897A
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US2830069A
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US2842462A
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US2979523A
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US2934500A
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US2909559A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |