US2577579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1945-05-05
•
Granted: 1951-12-04
•
Expires: 1965-05-05
Abstract
No abstract record available.
Inventors
- 👤 Bertie R Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:27
CPC Classifications
B; B62; B62B; B62B7/00; B62B7/04; B62B7/06; B62B7/08; B62B9/00; B62B9/26; B62B7/004; B62B7/064; Y; Y10; Y10S; Y10S224/00; Y10S224/925
Claims Analysis
Total Claims: 0
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FR335942A
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GB190908660A
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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) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |