US3471669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated switch assembly for underground electric distribution service
Assignee: AB Chance Co
•
Filing: 1968-01-16
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Granted: 1969-10-07
•
Expires: 1988-01-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:29
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/666; H01H9/00; H01H9/02; H01H9/04; H02; H02B; H02B7/00; H02B7/06; H02B7/08; H01H33/662; H01H33/66207; H01H2033/6623
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2280711A
Cited
US2785319A
Cited
US2769049A
Cited
US2849581A
Cited
US3105885A
Cited
US3248511A
Cited
US3307137A
Cited
US3287535A
Cited
US3320395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |