US3488901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular free-span curvilinear structures
Assignee: DIVERSIFICATION DEV Inc
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Filing: 1968-01-09
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Granted: 1970-01-13
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Expires: 1988-01-09
Abstract
No abstract record available.
Inventors
- 👤 Paul L Peterschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B1/3211; E04B2001/3235; E04B2001/3241; E04B2001/3252; E04B2001/3258; E04B2001/3264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |