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US3138838A
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Assignee: WR Grace and Co
•
Filing: 1963-02-18
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Granted: 1964-06-30
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 Richardson Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:41
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/1616; B65D33/1641; Y; Y10; Y10T; Y10T24/00; Y10T24/15; Y10T24/152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1832945A
Cited
GB846604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |