US3532731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alpha - triorganosiloxy- omega-hydroxy-diorganopolysiloxanes
Assignee: Wacker Chemie AG
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Filing: 1968-05-21
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Granted: 1970-10-06
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Expires: 1988-05-21
Abstract
No abstract record available.
Inventors
- 👤 Paul Hittmair
- 👤 Siegfried Nitzsche
- 👤 Ernst Wohlfarth
- 👤 Manfred Wick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:09
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C08G77/14; C08G77/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3135713A
Cited
US3355474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |