Patent US2965570A successfully refreshed from Google Patents.
US2965570A
Expired / Lapsed
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Phosphonate lubricants
Assignee: Pure Oil Co
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Filing: 1957-05-09
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Granted: 1960-12-20
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Expires: 1977-05-09
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Walter J Sandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:37
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
6 words
DIARYL ALKANE PHOSPHONATES OF THE FORMULA
Claim 2
Dependent Claim
6 words
DIARYL ALKANE PHOSPHONATES OF THE FORMULA
Claim 3
Dependent Claim
33 words
A METHOD OF REDUCING FRICTION BETWEEN TWO RELATIVELY MOVABLE SURFACES WHICH CONSISTS OF INCORPORATING BETWEEN SAID SURFACES AN AMOUNT, SUFFICIENT TO LUBRICATE SAID SURFACES, OF A LIQUID PHOSPHONATE AS DEFINED IS CLAIM 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |