Patent US3034998A successfully refreshed from Google Patents.
US3034998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop leak composition consisting of ground nut shells, castor oil and polyvinyl alcohol
Assignee: Individual
•
Filing: 1960-09-02
•
Granted: 1962-05-15
•
Expires: 1980-09-02
Abstract
No abstract record available.
Inventors
- 👤 Virgil O Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:45
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/02; C08L29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A STOP-LEAK COMPOSITION FOR THE COOLING SYSTEM OF AN ENGINE CONSISTING OF 3% BY WEIGHT CASTOR OIL, 75 TO 90% BY WEIGHT OF GROUND NUT SHELLS THAT PASS THROUGH A NO. 20 NESH SIEVE AND ARE RETAINED ON A NO. 80 MESH SIEVE, AND THE BALANCE POLYVINYL ALCOHOL.
Claim 2
Dependent Claim
48 words
A STOP-LEAK COMPOSITION FOR THE COOLING SYSTEM OF AN ENGINE CONSISTING OF 3% BY WEIGHT CASTOR OIL, 75 TO 90% BY WEIGHT OF GROUND NUT SHELLS THAT PASS THROUGH A NO. 20 NESH SIEVE AND ARE RETAINED ON A NO. 80 MESH SIEVE, AND THE BALANCE POLYVINYL ALCOHOL.
References Cited (Backward Citations)
US2237753A
Cited
US2612486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |