Patent US1986953A successfully refreshed from Google Patents.
Patent US3423897A successfully refreshed from Google Patents.
US3423897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame assemblies
Assignee: Individual
•
Filing: 1966-03-18
•
Granted: 1969-01-28
•
Expires: 1986-03-18
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Birum Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:39
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/04; E06B1/12; E06B3/00; E06B3/54; E06B3/58; E06B3/5807; E06B3/5821
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA547862A
Cited
US2867856A
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US2910154A
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US2934800A
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US3147518A
Cited
US3267629A
Cited
US3205630A
Cited
US3256668A
Cited
US3323262A
Cited
US3310920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |