Patent US3415772A successfully refreshed from Google Patents.
US3415772A
Expired / Lapsed
US
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Process for the preparation of polymer solutions from polymer latices
Assignee: Shell USA Inc
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Filing: 1964-07-13
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Granted: 1968-12-10
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Expires: 1984-07-13
Abstract
No abstract record available.
Inventors
- 👤 Heij Gerardus E La
- 👤 Jacques A Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:50
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08C; C08C1/00; C08C1/02; C08C1/075; C08C1/08; C08J3/09; C08J2321/00
Claims Analysis
Total Claims: 0
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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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |