Patent US3049796A successfully refreshed from Google Patents.
US3049796A
Expired / Lapsed
US
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Perforate metal sheets
Assignee: Pall Corp
•
Filing: 1957-07-12
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Granted: 1962-08-21
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Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 David B Pall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:49
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/4609; B07B1/4618; B07B1/4672; Y; Y10; Y10S; Y10S162/00; Y10S162/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12424; Y10T428/12479
Claims Analysis
Total Claims: 0
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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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |