US3516429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for automatic control of gas pressure
Assignee: Sartorius Werke GmbH
•
Filing: 1968-04-11
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Granted: 1970-06-23
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Expires: 1988-04-11
Abstract
No abstract record available.
Inventors
- 👤 Gerd Sandstede
- 👤 Erich Maria Robens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2013; G05D16/2026; G05D16/2033; F; F16; F16K; F16K31/00; F16K31/44; F16K31/48; F16K31/485; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/07; G05B19/075; G05D16/204; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0357; Y10T137/0379; Y10T137/0396; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/2703; Y10T137/2705; Y10T137/7722; Y10T137/7758; Y10T137/7761; Y10T137/7762
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2709340A
Cited
US2851864A
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US3279214A
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US3307370A
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US3416547A
Cited
US3429336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |