US2951638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas pumping system analog
Assignee: Southern Gas Association
•
Filing: 1955-05-31
•
Granted: 1960-09-06
•
Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 John V Hughes
- 👤 William L Rollwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:47
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2241595A
Cited
US2345712A
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US2695750A
Cited
US2564682A
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US2576499A
Cited
US2661898A
Cited
US2775714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |