US2398952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing silica glass
Assignee: Individual
•
Filing: 1941-12-22
•
Granted: 1946-04-23
•
Expires: 1961-12-22
Abstract
No abstract record available.
Inventors
- 👤 Henry J Nachod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:53
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/12; C03B17/00; C03B17/04; C03B3/00; C03B5/02; C03B5/033; C03B5/0336; C03B5/16; C03B5/26
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) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |