US3520838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylic fillers and the reinforcement of elastic and plastic materials therewith
Assignee: BURKE OLIVER W JUN
•
Filing: 1964-12-07
•
Granted: 1970-07-21
•
Expires: 1984-12-07
Abstract
No abstract record available.
Inventors
- 👤 Oliver W Burke Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:39
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; C; C08; C08F; C08F36/00; C08F36/02; C08F36/20; C08F8/00; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08L; C08L101/00; C08L21/00; C09; C09B; C09B63/00; C09B67/00; C09B67/006; C09B67/0061; C09C; C09C1/00; C09D; C09D157/00; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB593072A
Cited
US2614089A
Cited
US2614093A
Cited
US2643987A
Cited
US2600024A
Cited
US2755270A
Cited
GB799043A
Cited
US3190850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |