US3452532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of purified asbestos products
Assignee: Rex Asbestwerke Graf Von Rex KG
•
Filing: 1967-07-20
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Granted: 1969-07-01
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Expires: 1987-07-20
Abstract
No abstract record available.
Inventors
- 👤 Werner Wilke
- 👤 Hans Fetzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:43
CPC Classifications
C; C04; C04B; C04B30/00; C04B30/02; C04B41/00; C04B41/0072; C04B41/53; D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/20; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10S57/00; Y10S57/904
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |