US2229489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making glass wool
Assignee: Individual
•
Filing: 1939-06-14
•
Granted: 1941-01-21
•
Expires: 1959-06-14
Abstract
No abstract record available.
Inventors
- 👤 Randolph H Barnard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:05
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/085; C03B37/01; C03B37/02; C03B37/07
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) | 1944-01-21 | 1944-07-22 | 1945-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-21 | 1948-07-22 | 1949-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-21 | 1952-07-22 | 1953-01-21 | $7700.00 | Window Closed / Lapsed |