US2492702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of sizing paper and product
Assignee: GAF Chemicals Corp
•
Filing: 1939-06-16
•
Granted: 1949-12-27
•
Expires: 1959-06-16
Abstract
No abstract record available.
Inventors
- 👤 Neubert Willi
- 👤 Krzikalla Hans
- 👤 Armbruster Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:24
CPC Classifications
D; D21; D21H; D21H23/00; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/60; D21H17/62; H; H01; H01J; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0015
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) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |