US3401604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential area gas cylinder
Assignee: Industrial Specialties Inc
•
Filing: 1967-05-17
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Granted: 1968-09-17
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Expires: 1987-05-17
Abstract
No abstract record available.
Inventors
- 👤 Leland F Blatt
- 👤 Paul R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:30
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B15/00; F15B15/08; F15B15/14; F15B15/17; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/515; F15B2211/5153; F15B2211/5154; F15B2211/60; F15B2211/625; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7052; F15B2211/77; F15B2211/7716
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1550254A
Cited
US2343316A
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US2677933A
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US2740859A
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GB821648A
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US3078065A
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US3147671A
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US3232180A
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US3232181A
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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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |