US2767966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforated bubble tray
Assignee: Stone and Webster Engineering Corp
•
Filing: 1953-05-06
•
Granted: 1956-10-23
•
Expires: 1973-05-06
Abstract
No abstract record available.
Inventors
- 👤 Charles T Chave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:54
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22; B01D3/225; B01D3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB233878A
Cited
US999320A
Cited
US1621728A
Cited
US1744134A
Cited
DE633433C
Cited
US2333193A
Cited
US2609276A
Cited
US2669505A
Cited
FR992066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |