Patent US5496860A successfully refreshed from Google Patents.
Patent US2387831A successfully refreshed from Google Patents.
US2387831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic composition containing polyvinyl partial acetal resins
Assignee: Carbide and Carbon Chemicals Corp
•
Filing: 1943-06-11
•
Granted: 1945-10-30
•
Expires: 1963-06-11
Abstract
No abstract record available.
Inventors
- 👤 Howard D Cogan
- 👤 Richard W Quarles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08L; C08L29/00; C08L29/14; Y; Y10; Y10S; Y10S8/00; Y10S8/17; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
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) | 1948-10-29 | 1949-04-30 | 1949-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-10-29 | 1953-04-30 | 1953-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-10-29 | 1957-04-30 | 1957-10-30 | $7700.00 | Window Closed / Lapsed |