US1972390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of expanded vermiculite
Assignee: NAT VERMICULITE PRODUCTS CORP
•
Filing: 1931-11-02
•
Granted: 1934-09-04
•
Expires: 1951-11-02
Abstract
No abstract record available.
Inventors
- 👤 Carl S Miner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20; C04B14/204; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/068; C04B20/10; Y; Y10; Y10S; Y10S106/00; Y10S106/03; Y10S264/00; Y10S264/63; Y10S71/00; Y10S71/904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1937-09-03 | 1938-03-05 | 1938-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-03 | 1942-03-05 | 1942-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-03 | 1946-03-05 | 1946-09-04 | $7700.00 | Window Closed / Lapsed |