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US2593707A
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Assignee: Isaac Braithwaite and Son Engineers Ltd
•
Filing: 1949-07-22
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Granted: 1952-04-22
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Expires: 1969-07-22
Abstract
No abstract record available.
Inventors
- 👤 Walker Thomas Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:42
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US403073A
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US1469026A
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DE291316C
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US1264635A
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US1533032A
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US1627343A
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DE599791C
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FR843982A
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FR880803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |