Patent US2211951A successfully refreshed from Google Patents.
US2257112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of special shapes of heat and sound insulation bodies
Assignee: Owens Corning
•
Filing: 1938-10-13
•
Granted: 1941-09-30
•
Expires: 1958-10-13
Abstract
No abstract record available.
Inventors
- 👤 Forster Alfred Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; D04H1/4226
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) | 1944-09-29 | 1945-03-31 | 1945-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-29 | 1949-03-31 | 1949-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-29 | 1953-03-31 | 1953-09-30 | $7700.00 | Window Closed / Lapsed |