US2880018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glassed tube sheet seal
Assignee: Pfaudler Permutit Inc
•
Filing: 1955-06-15
•
Granted: 1959-03-31
•
Expires: 1975-06-15
Abstract
No abstract record available.
Inventors
- 👤 Melvin B Robinson
- 👤 Edward S Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:06
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/001; Y; Y10; Y10S; Y10S285/00; Y10S285/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US949621A
Cited
FR515198A
Cited
US1497396A
Cited
US1714703A
Cited
US1938286A
Cited
US2096240A
Cited
US2266609A
Cited
US2356047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |