US3370391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient structural beam
Assignee: Kaiser Gypsum Co Inc
•
Filing: 1965-09-07
•
Granted: 1968-02-27
•
Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 Harlan C Dupuis
- 👤 Deane W Rockwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:24
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US104865A
Cited
US333603A
Cited
US945682A
Cited
US2073781A
Cited
US3090164A
Cited
US3188772A
Cited
US3243930A
Cited
US3177620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |