US3488067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled pipe penetrations in concrete walls
Assignee: Gilbert Associates Inc
•
Filing: 1967-09-12
•
Granted: 1970-01-06
•
Expires: 1987-09-12
Abstract
No abstract record available.
Inventors
- 👤 Walter C Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:30
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/04; F; F16; F16L; F16L59/00; F16L59/06; F16L59/12; G21C11/00; G21C11/08; G21C13/032; G21C13/036; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1367349A
Cited
US1535209A
Cited
US2127073A
Cited
DE1041042B
Cited
FR1178105A
Cited
US3017202A
Cited
US3344803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |