US2966441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low solubility hydrated calcium silicate
Assignee: Johns Manville Corp
•
Filing: 1958-05-19
•
Granted: 1960-12-27
•
Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Linden Carl R Vander
- 👤 Laurence R Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:14
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/22; A; A01; A01N; A01N25/00; A01N25/08; C01B33/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A METHOD OF MAKING A NEW HYDROUS CALCIUM SILICATE COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
13 words
A METHOD OF MAKING A NEW HYDROUS CALCIUM SILICATE COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2665996A
Cited
US2748008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |