Patent US2728356A successfully refreshed from Google Patents.
US2728356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated plastic tubing
Assignee: Connecticut Hard Rubber Co
•
Filing: 1953-10-16
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Granted: 1955-12-27
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Expires: 1973-10-16
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Brinsmade
- 👤 Robert L Hibbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:25
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/111; Y; Y10; Y10S; Y10S138/00; Y10S138/03; Y10S138/07; Y10S285/00; Y10S285/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563578A
Cited
US1120268A
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US1554739A
Cited
US2299520A
Cited
US2307817A
Cited
US2371991A
Cited
US2594842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |