US2164500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siliceous product and method of making the same
Assignee: Johns Manville Corp
•
Filing: 1935-11-29
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Granted: 1939-07-04
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Expires: 1955-11-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Cummins
- 👤 Lewis B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:59
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-07-03 | 1943-01-02 | 1943-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-03 | 1947-01-02 | 1947-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-03 | 1951-01-02 | 1951-07-04 | $7700.00 | Window Closed / Lapsed |