US2703630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas distribution device
Assignee: Research Corp
•
Filing: 1952-07-31
•
Granted: 1955-03-08
•
Expires: 1972-07-31
Abstract
No abstract record available.
Inventors
- 👤 Alexander N Crowder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:15
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/01; B03C3/011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US527341A
Cited
US710624A
Cited
US1343482A
Cited
US1333790A
Cited
US1356086A
Cited
FR520598A
Cited
DE450391C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |