US3445257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardener for water glass cements
Assignee: Hoechst AG
•
Filing: 1965-05-18
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Granted: 1969-05-20
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Expires: 1985-05-18
Abstract
No abstract record available.
Inventors
- 👤 Albert Hloch
- 👤 Rudolf Kohlhaas
- 👤 Nikolay Medic
- 👤 Helmut Neises
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:19
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C04B22/00; C04B22/08; C04B22/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA449983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |