US2897472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary terminal seal
Assignee: Individual
•
Filing: 1958-06-18
•
Granted: 1959-07-28
•
Expires: 1978-06-18
Abstract
No abstract record available.
Inventors
- 👤 William M O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:21
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/22; H02K5/225; H02K5/12; Y; Y10; Y10S; Y10S439/00; Y10S439/926
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2235429A
Cited
US2451701A
Cited
US2616946A
Cited
US2783295A
Cited
US2820213A
Cited
US2800525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |