US3420276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas permeable flexible hose
Assignee: Hewitt Robins Inc
•
Filing: 1965-07-22
•
Granted: 1969-01-07
•
Expires: 1985-07-22
Abstract
No abstract record available.
Inventors
- 👤 Clayton H Skinner
- 👤 Paul J Sick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:42
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/20; F16L33/207; F16L33/2071; F16L33/2073; B; B31; B31C; B31C3/00; F16L11/00; F16L11/04; F16L11/08; F16L11/085; F16L11/087; F16L11/088; F16L11/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1009465A
Cited
US1954724A
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US2661026A
Cited
US2965151A
Cited
US2800145A
Cited
US2750232A
Cited
US3073351A
Cited
DE1157039B
Cited
GB986342A
Cited
US3103789A
Cited
US3318338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |