Patent US2937145A successfully refreshed from Google Patents.
US2937145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifreeze composition
Assignee: EIDP Inc
•
Filing: 1955-12-22
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Granted: 1960-05-17
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Expires: 1975-12-22
Abstract
No abstract record available.
Inventors
- 👤 Cutlip Claude Ross
- 👤 Scheer Richard David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:57
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A COLORED ANTI-CORROSIVE ANTIFREEZE SOLUTION THAT CHANGES COLOR DURING ITS INVERSION FROM A NON-CORROSIVE TO A CORROSIVE STATE, COMPRISING-
Claim 2
Dependent Claim
19 words
A COLORED ANTI-CORROSIVE ANTIFREEZE SOLUTION THAT CHANGES COLOR DURING ITS INVERSION FROM A NON-CORROSIVE TO A CORROSIVE STATE, COMPRISING-
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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |