US3423898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof framing system
Assignee: INTERN ENTERPRISES Inc
•
Filing: 1966-07-28
•
Granted: 1969-01-28
•
Expires: 1986-07-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Tracy
- 👤 Wayne H Coloney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:35
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/26; E04B1/2604; E04B1/2608; E04B7/00; E04B7/02; E04B7/06; E04B7/063; E04B2001/2616
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US753053A
Cited
US862498A
Cited
US1551714A
Cited
US1657243A
Cited
US2013101A
Cited
US3036347A
Cited
US3333875A
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 |