US1799255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making insulating material
Assignee: Armstrong World Industries Inc
•
Filing: 1927-04-15
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Granted: 1931-04-07
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Expires: 1947-04-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Russ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:11
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B28/00; C04B28/02; C04B28/10; C04B41/45; C04B41/50; C04B41/5076; C04B41/5079; C04B41/60; C04B41/61; C04B41/65
Claims Analysis
Total Claims: 0
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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) | 1934-04-06 | 1934-10-06 | 1935-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-04-06 | 1938-10-06 | 1939-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-04-06 | 1942-10-06 | 1943-04-07 | $7700.00 | Window Closed / Lapsed |