Patent US4691820A successfully refreshed from Google Patents.
US3143532A
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US
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Process for the manufacture of bead polymers
Assignee: Hoechst AG
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Filing: 1959-12-04
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Granted: 1964-08-04
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Expires: 1979-12-04
Abstract
No abstract record available.
Inventors
- 👤 Karl-Heinz Dr Kahrs
- 👤 Starck Werner
- 👤 Fritz Dr Winkler
- 👤 Wolfgang Dr Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:49
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2580277A
Cited
US2706189A
Cited
US2840549A
Cited
US2956973A
Cited
US3036130A
Cited
US3030326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |