Patent US3499723A successfully refreshed from Google Patents.
US3499723A
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US
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Atmospheric pollution control
Assignee: Lockheed Martin Corp
•
Filing: 1967-05-04
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Granted: 1970-03-10
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Expires: 1987-05-04
Abstract
No abstract record available.
Inventors
- 👤 William F Hamilton
- 👤 Eli Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:12
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/14; A61L9/01; B; B01; B01D; B01D53/00; B01D53/34; B65; B65D; B65D83/00; B65D83/14; B65D83/141; Y; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |