Patent US2828691A successfully refreshed from Google Patents.
US2828691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Igniter
Assignee: Atlantic Research Corp
•
Filing: 1956-06-18
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Granted: 1958-04-01
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Expires: 1976-06-18
Abstract
No abstract record available.
Inventors
- 👤 Robert O Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:40
CPC Classifications
F; F42; F42C; F42C7/00; F42C7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190220467A
Cited
US2775201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |