US2400333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl acetal composition
Assignee: Shell Development Co
•
Filing: 1943-04-09
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Granted: 1946-05-14
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Expires: 1963-04-09
Abstract
No abstract record available.
Inventors
- 👤 Franklin A Bent
- 👤 Kenneth E Marple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:13
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C08J2329/00; C08J2329/14
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) | 1949-05-13 | 1949-11-12 | 1950-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-13 | 1953-11-12 | 1954-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-13 | 1957-11-12 | 1958-05-14 | $7700.00 | Window Closed / Lapsed |