US2903018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parting agent for conduits
Assignee: Zonolite Co
•
Filing: 1954-12-22
•
Granted: 1959-09-08
•
Expires: 1974-12-22
Abstract
No abstract record available.
Inventors
- 👤 David C Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:03
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US400308A
Cited
US771594A
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US1549406A
Cited
GB499338A
Cited
US2322738A
Cited
GB562035A
Cited
US2444271A
Cited
US2486822A
Cited
US2749393A
Cited
US2774383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |