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US2594864A
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Assignee: HOPKINS AND BUCKLAND Ltd
•
Filing: 1949-07-19
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Granted: 1952-04-29
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Expires: 1969-07-19
Abstract
No abstract record available.
Inventors
- 👤 Buckland Stuart Gibson
- 👤 Hopkins George Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:07
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B2009/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US116960A
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US446480A
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US527273A
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US533152A
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US1668140A
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US1763034A
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US1962569A
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US1943768A
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US2490612A
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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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |