US2428771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sheet gasket material
Assignee: Armstrong World Industries Inc
•
Filing: 1944-06-16
•
Granted: 1947-10-14
•
Expires: 1964-06-16
Abstract
No abstract record available.
Inventors
- 👤 Almy Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:58
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/102
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |