US3494092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated folding slab construction
Assignee: Individual
•
Filing: 1967-07-05
•
Granted: 1970-02-10
•
Expires: 1987-07-05
Abstract
No abstract record available.
Inventors
- 👤 Delp W Johnson
- 👤 Richard E Bottjer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:04
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/35; E04B1/3533; E04B1/3538; E04B1/02; E04B1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2372200A
Cited
US2497887A
Cited
US2462415A
Cited
FR997182A
Cited
CH260262A
Cited
US2670986A
Cited
US3177530A
Cited
US3331181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |